Turn off source control provider when running automation tests (#90) #199

Job	Run time
Test StringEnum Trimmed	53s
Timestamp	17s
Build AutoDiscovery	57s
Build Mac Logging	47s
Build Windows Pass 1	8m 6s
Build and Test Libraries on Windows	9m 27s
Build macOS Pass 1	5m 15s
Build Libraries on macOS	6m 36s
Build macOS Shim	35s
Build Windows Shim	59s
Build macOS UEFS	1m 30s
Build Windows UEFS	3m 44s
Build macOS Pass 2	4m 45s
Build Windows Pass 2	8m 53s
Publish to NuGet	38s
Publish to GitHub	54s
Publish UEFS Container	27s
Test Schema Generation	0s
	54m 43s

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