Reduce CI build time

[chandrashekar-s]

There are few optimizations done as part of this PR, which has reduced the build time to 40 min from 1 hour. There is scope for more optimization as mentioned below.

1. Currently we see that there are 2 parallel streams running for e2e test cases as implemented in this PR, this can be further increased by starting more source HAPI servers and running more parallel tests (this might need a higher configuration machine though).
2. We build the application twice, once for creating a fat jar needed for building batch pipeline image and another time while creating the controller docker image, see if we can build once.