Fix submodule errors on Azure Pipelines

[utilForever]

@kaylangan Hi, Can you take a look at this problem?

2018-10-16T23:25:01.3584211Z ##[command]git submodule sync
2018-10-16T23:25:02.9579263Z ##[command]git -c http.https://github.com.extraheader="AUTHORIZATION: basic ***" submodule update --init --force --depth=2
2018-10-16T23:25:03.3250651Z Submodule 'Libraries/googlebenchmark' (https://github.com/google/benchmark.git) registered for path 'Libraries/googlebenchmark'
2018-10-16T23:25:03.3251197Z Submodule 'Libraries/googletest' (http://www.github.com/google/googletest) registered for path 'Libraries/googletest'
2018-10-16T23:25:05.4506873Z Cloning into 'D:/a/1/s/Libraries/googlebenchmark'...
2018-10-16T23:25:06.9937926Z Cloning into 'D:/a/1/s/Libraries/googletest'...
2018-10-16T23:25:06.9947183Z warning: redirecting to https://github.com/google/googletest.git/
2018-10-16T23:25:08.2396916Z error: Server does not allow request for unadvertised object 8986839e4ac67facb52abc7fff3d5082e854aab5
2018-10-16T23:25:08.3244318Z Fetched in submodule path 'Libraries/googlebenchmark', but it did not contain 8986839e4ac67facb52abc7fff3d5082e854aab5. Direct fetching of that commit failed.
2018-10-16T23:25:08.3577335Z ##[error]System.InvalidOperationException: Git submodule update failed with exit code: 1