Allow specifying multiple $Files using string array

[am11]

This enables array input for Files parameter:

xRobocopy CopyByUsingFilesFilter
{
  Source = 'C:\temp\source'
  Destination = 'C:\temp\destination'
  Files = @('test1.txt', 'test2.txt')
}

while keeping the (currently supported) single input Files = 'test.txt' and glob pattern Files = '*.sql' intact.

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This change is 

[am11]

CI is failing due to a certificate error:

New-SelfSignedCertificateEx : Exception setting "ProviderName": "Unable to cast COM object of type 'CERTENROLLLib.CX509PrivateKeyClass' to interface type 'CERTENROLLLib.IX509PrivateKey2'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{728AB362-217D-11DA-B2A4-000E7BBB2B09}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE))."

[stale[bot]]

Labeling this pull request (PR) as abandoned since it has gone 14 days or more since the last update. An abandoned PR can be continued by another contributor. The abandoned label will be removed if work on this PR is taken up again.

[gaelcolas]

Hi @am11, the error seems to be coming from the DscResources.tests Just to validate it's not been fixed since you last tried, I'd appreciate if you could try to push again to trigger an AppVeyor build. Otherwise I'll try to get back to this request in a few weeks to investigate and get it merged. The change itself looks ok, although there are no tests alongside so I'll need to spend some time.

Thanks

[codecov-io]

Codecov Report

Merging #32 into dev will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev      #32   +/-   ##
=======================================
  Coverage   22.95%   22.95%           
=======================================
  Files           1        1           
  Lines          61       61           
=======================================
  Hits           14       14           
  Misses         47       47

Impacted Files	Coverage Δ
DSCResources/MSFT_xRobocopy/MSFT_xRobocopy.psm1	22.95% <ø> (ø)	:arrow_up:

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[am11]

Retriggering the build did the trick, yay! 🚀

[am11]

@gaelcolas, just a note. Not all files in the repo follow the eol rule written in .gitattributes, so after the fresh clone, we get the modified files even when our global autocrlf is false. I didn't wanted to push any unrelated change in this PR, but if you think it's fine, I will do that. Otherwise, that can be fixed separately.

[gaelcolas]

Thanks for the heads up. I'll probably need to first fix that in another PR and then ask you to rebase. But I'll have to have a proper look, in a few days.