SCC Verifier Docker now publishes stubs just once (#1223)

Originally, SCC Verifier Docker published artifacts twice.
Once defined in build.gradle - which also uploaded the original contracts and second time in a publish stubs task defined in gradle plugin. This PR removes the definition from build.gradle and now only the stubs are published and just once.

docker/spring-cloud-contract-docker/project/build.gradle

@@ -118,9 +118,6 @@ publishing {
 		}
 	}
 	publications {
-		mavenJava(MavenPublication) {
-			from components.java
-		}
 	}
 }
 
@@ -157,4 +154,4 @@ task resolveDependencies {
 			}
 		}
 	}
-}
+}