[Build] Cache eclipse formatter p2 dependency when baking ci image

The eclipse formatter used by spotless is resolved at runtime and not declared as
gradle dependency. Therefore we need to run the spotless task to ensure we have
the dependencies resolved as part of our ci image baking.

This should avoid issues with connecting to p2 repos we have experienced lately
in our ci environment

Author: breskeby

build.gradle

@@ -301,7 +301,10 @@ allprojects {
     if (project.path.contains(":distribution:docker")) {
       enabled = false
     }
-
+    if (project.path.contains(":libs:cli")) {
+      // ensure we resolve p2 dependencies for the spotless eclipse formatter
+      dependsOn "spotlessJavaCheck"
+    }
   }
 
   plugins.withId('lifecycle-base') {