Randomize application names in tests (#1465)

* feat: Add name template to test manifests

* feat: Randomize application names

* infra: Add Jinja2 to requirements.txt

* feat: Copy YAML files from examples to template-manifests

* fix: Remove templating from composition file

* fix: Bring back namespace creation for test_force_delete_application

* feat: self -> cls in @classmethod functions

Author: ishan-karmakar

tests/requirements.txt

@@ -1,4 +1,5 @@
 pyyaml
 kubernetes
 bs4
-lxml
+lxml
+Jinja2

tests/template-manifests/appmetrics-custom-hs1.yaml

@@ -0,0 +1,7 @@
+# defines an instance of the HelloWorldService kind
+apiVersion: platformapi.kubeplus/v1alpha1
+kind: CustomHelloWorldApp
+metadata:
+  name: {{ name }}
+spec:
+  # no specific specs

tests/template-manifests/hello-world-hs1-replicas-2.yaml

@@ -0,0 +1,8 @@
+apiVersion: platformapi.kubeplus/v1alpha1
+kind: HelloWorldService
+metadata:
+  name: {{ name }}
+spec:
+  greeting: Hello hello hello
+  replicas: 2 
+

tests/template-manifests/hello-world-hs1.yaml

@@ -0,0 +1,7 @@
+apiVersion: platformapi.kubeplus/v1alpha1
+kind: HelloWorldService
+metadata:
+  name: {{ name }}
+spec:
+  greeting: Hello hello hello 
+  replicas: 1

tests/template-manifests/hello-world-hs2.yaml

@@ -0,0 +1,8 @@
+apiVersion: platformapi.kubeplus/v1alpha1
+kind: HelloWorldService
+metadata:
+  name: {{ name }}
+spec:
+  greeting: Hello hello hello - hs2
+  replicas: 1 
+

tests/tenant1.yaml

@@ -1,6 +1,6 @@
 apiVersion: platformapi.kubeplus/v1alpha1
 kind: WordpressService 
 metadata:
-  name: tenant1
+  name: {{ name }}
 spec:
   resourceName: wp-for-tenant1