fix date compare to use correct hour format lower case: GetDateFormatUpdates

[vairam-svs]

https://github.com/PowerShell/PowerShell-Tests/issues/4

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This change is 

[vairam-svs]

my PS version table info: Name Value

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PSVersion 5.0.10514.6
WSManStackVersion 3.0
SerializationVersion 1.1.0.1
CLRVersion 4.0.30319.42000
BuildVersion 10.0.10514.6
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion 2.3