Based on standard practices, we need to have a copyright and license notice at the top of each source file. Removed existing copyrights and updated/added copyright notices for .h, .cpp, .cs, .ps1, and .psm1 files.
Updated module manifests for consistency to have Author = "PowerShell" and Company = "Microsoft Corporation". Removed multiple line breaks.
Separate PR coming to update contribution document for new source files: #6140
Manually reviewed each change.
Fix#6073
* Added tests to close code coverage in CIM area
Added CimAdapter.Tests for adaptation layer (code cribbed from BVT tests)
Added SessionOption.Tests.ps1 (Code cribbed from BVT tests)
Modified CimClass tests by adding more tests
Added CimSession.Tests for basic tests of New-CimSession cmdlet
Added CimInstance.Tests for basic tests of Get-CimInstance
* Add CI tags to tests
* unify test execution to use try/catch for marking tests as skipped
moved test which retrieves cimclass via method to feature as it is not
a common operation, this test can take some time as well
