Adding CMake module to enable/disable transport adapters
TRANSPORT ADAPTER BUILD
Default: If no option is explicitly added, curl will be used for POSIX and WIN HTTP for WIndows
Windows: Both CURL and WIN_HTTP can be build to be used.
POSIX: Only CURL is acceptable. If WIN_HTTP is set, generate step will fail for user
Defines `BUILD_WIN_HTTP_TRANSPORT_ADAPTER` and `BUILD_CURL_HTTP_TRANSPORT_ADAPTER` for source code
Fixes#350
Added build arguments to pass to cmake for running tests. If these
options are not passed during cmake build and someone tries to run test,
it will throw error "No tests were found!!!"
Cmake fails to find packages(curl, etc) if VCPKG_DEFAULT_TRIPLET is not set to x64-windows-static. If not set, cmake sets VCPKG_TARGET_TRIPLET to x64-windows instead of x64-windows-static. Since curl was installed using x64-windows-static in vcpkg, cmake fails to find the package. Adding set VCPKG_DEFAULT_TRIPLET to x64-windows-static explicitly in build instructions so that it is helpful to avoid cmake error(could not find CURL)
