CMake Project Improvements

Manual upmerge from v1.0.x

PHP: missed a macro

Conflicts:
	src/ruby/pb/test/client.rb
	src/ruby/pb/test/server.rb
	tools/dockerfile/test/php7_jessie_x64/Dockerfile

compare test config as objects instead of strings

update to use new nuget client in tests

backport #7502 from dgquintas/cpp_compression_level

C++ Compression Level set properly

C++ Compression Level set properly

Ruby Tools: automatically include plugin argument in protoc command

PHP: cleanup for GA

PHP: cleanup for GA

PHP: use php7_wrapper to reduce duplicated codes on v1.0.x branch(final part)

PHP: use php7_wrapper to reduce duplicated codes(final part)