Fixed SourceObjectPresentTest test names.
Fixed SourceObjectPresentTest test names.

GoogleCloudPlatform/gcsfuse,GoogleCloudPlatform/gcsfuse,GoogleCloudPlatform/gcsfuse,mbrukman/gcsfuse,jacobsa/ratelimit,BanzaiMan/gcsfuse,kahing/gcsfuse,jacobsa/timeutil,BanzaiMan/gcsfuse