Added mock tests to the msbuild script
Made TEST_HTTPMOCK_OUTPUT environment variable optional
Fixed indentation
Merge pull request #2420 from stankovski/mocks

Added mock tests to the msbuild script
Merge branch 'dev' of https://github.com/Azure/azure-sdk-tools into dev
Merge branch 'dev' of https://github.com/AzureRT/azure-sdk-tools into dev