Add warnings as errors for test.

[mnaveedb]

In CMAKE the warnings are enabled for the library but not for tests.

May be its might not be good idea to enable then in tests as well.
This can be done Line 15 Cmake : SET( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} .. adding -Werror -Wall -Wextra

and then we can remove the target_compile_options(finalmq PRIVATE -Werror -Wall -Wextra) which enable s them for the lib only