Make jackson-core dependency provided to avoid pulling start of bundle jackson-core in karaf features (FasterXML#18)

Author: steinarb

pom.xml

@@ -42,6 +42,7 @@
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-core</artifactId>
+      <scope>provided</scope>
     </dependency>
 
     <dependency> <!-- all components use junit for testing -->