* Create client_context_test_peer.h
mock-up class for ClientContext
* Add ClientContextTestPeer as a friend for test
* Update client_context_test_peer.h
* Update client_context_test_peer.h
* unit test for client_context_test_peer.h
* unit test for client_context_test_peer.h
* fix for tools/buildgen/generate_projects.sh
* Revert "fix for tools/buildgen/generate_projects.sh"
This reverts commit b007aa8c2b.
* re-fix for tools/buildgen/generate_projects.sh
* Remove an empty line
Co-authored-by: Vijay Pai <vpai@google.com>