* Expand all containment nav props; retrieve Media Entity paths prior to expanding
* Update path count to account for expanded containment nav. props.
* Remove containment in sample CSDL
Expanding workbook nav. props leads to many paths since the containment levels go very deep
* Check for navigability of navigation props
* Comment correction
* Fix broken tests
* Check whether navigation is allowed to a navigation property
* Update tests; add tests to validate navigability of navigation properties
* Update test CSDL doc. with sample NavigationRestrictions annotations
* Concise code; move declaration closer to usage
Co-authored-by: Irvine Sunday <irochand@microsoft.com>
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