Refactor maven POMs to put all information about the dependencies/plugins in the root POM dapr#940

Author: lburgazzoli

examples/pom.xml

@@ -23,116 +23,95 @@
     <maven.compiler.target>${java.version}</maven.compiler.target>
     <maven.deploy.skip>true</maven.deploy.skip>
     <spotbugs.fail>false</spotbugs.fail>
-    <opentelemetry.version>0.14.0</opentelemetry.version>
   </properties>
 
   <dependencies>
     <dependency>
       <groupId>commons-cli</groupId>
       <artifactId>commons-cli</artifactId>
-      <version>1.4</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-protobuf</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-stub</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-api</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-testing</artifactId>
-      <version>${grpc.version}</version>
       <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java-util</artifactId>
       <version>${protobuf.version}</version>
     </dependency>
-    <dependency>
-      <groupId>com.github.os72</groupId>
-      <artifactId>protoc-jar-maven-plugin</artifactId>
-      <version>3.11.4</version>
-    </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-web</artifactId>
-      <version>2.7.8</version>
     </dependency>
     <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-autoconfigure</artifactId>
-      <version>2.7.8</version>
     </dependency>
     <dependency>
       <groupId>com.jayway.jsonpath</groupId>
       <artifactId>json-path</artifactId>
-      <version>2.4.0</version>
     </dependency>
     <dependency>
       <groupId>io.opentelemetry</groupId>
       <artifactId>opentelemetry-sdk</artifactId>
-      <version>${opentelemetry.version}</version>
     </dependency>
     <dependency>
       <groupId>io.opentelemetry</groupId>
       <artifactId>opentelemetry-exporter-logging</artifactId>
-      <version>${opentelemetry.version}</version>
     </dependency>
     <dependency>
       <groupId>io.opentelemetry</groupId>
       <artifactId>opentelemetry-exporter-zipkin</artifactId>
-      <version>${opentelemetry.version}</version>
     </dependency>
     <dependency>
       <groupId>org.junit.jupiter</groupId>
       <artifactId>junit-jupiter</artifactId>
       <scope>test</scope>
     </dependency>
+
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-core</artifactId>
-      <scope>compile</scope>
     </dependency>
+
+    <dependency>
+      <groupId>com.evanlennick</groupId>
+      <artifactId>retry4j</artifactId>
+    </dependency>
+
     <dependency>
       <groupId>org.junit.platform</groupId>
       <artifactId>junit-platform-console-standalone</artifactId>
-      <version>1.7.0</version>
-      <scope>compile</scope>
     </dependency>
+
     <dependency>
       <groupId>io.dapr</groupId>
       <artifactId>dapr-sdk-springboot</artifactId>
-      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>io.dapr</groupId>
       <artifactId>dapr-sdk-actors</artifactId>
-      <version>${project.version}</version>
     </dependency>
     <dependency>
       <groupId>io.dapr</groupId>
       <artifactId>dapr-sdk-workflows</artifactId>
-      <version>${dapr.sdk-workflows.version}</version>
     </dependency>
     <dependency>
       <groupId>io.dapr</groupId>
       <artifactId>dapr-sdk</artifactId>
-      <version>${project.version}</version>
-    </dependency>
-    <dependency>
-      <groupId>com.evanlennick</groupId>
-      <artifactId>retry4j</artifactId>
-      <version>0.15.0</version>
     </dependency>
   </dependencies>
 
@@ -141,7 +120,6 @@
       <plugin>
         <groupId>com.github.os72</groupId>
         <artifactId>protoc-jar-maven-plugin</artifactId>
-        <version>3.11.4</version>
         <executions>
           <execution>
             <phase>generate-sources</phase>
@@ -174,31 +152,27 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
-        <version>3.8.1</version>
         <configuration>
           <release>11</release>
         </configuration>
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-deploy-plugin</artifactId>
-        <version>${maven-deploy-plugin.version}</version>
         <configuration>
           <skip>true</skip>
         </configuration>
       </plugin>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-site-plugin</artifactId>
-        <version>3.9.1</version>
         <configuration>
           <skip>true</skip>
         </configuration>
       </plugin>
       <plugin>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-maven-plugin</artifactId>
-        <version>${springboot.version}</version>
         <executions>
           <execution>
             <goals>