Created a Java Oracle8 Dockerfile directory and moved all build_interop.sh to under template/.  Added java_oracle8 to the client matrix.

Features included in this merge:
- Added script to build and upload docker image for matrix test.
- Added script to create test cases and created go__master testcases based on it.
- Created dictionary for runtimes and gRPC releases for supported languages.
- Added go 1.7 and 1.8 Dockerfile/templates.

See tools/interop_matrix/README.md for details.

added h2 and twisted python modules