Fix MemoryAssertions and test

[mdrichardson]

Related: microsoft/botbuilder-dotnet#5084

Description

The MemoryAssertions tests were silently failing. They'll now pass and also elicit errors if they fail. In the Node version, it also was passing the assertions when it shouldn't, due to this, which was correct in Dotnet, which correctly uses ||. You can see the issues in the original code if you throw a breakpoint here

Specific Changes

• Added an OnError trigger for the PropertyMock test script. It would otherwise silently swallow errors.
• Adjusted what memory properties get written and overwritten.

[coveralls]

Pull Request Test Coverage Report for Build 473191049

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 84.377%

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Files with Coverage Reduction	New Missed Lines	%
libraries/botbuilder-dialogs-adaptive-testing/src/testScript.ts	1	91.78%

Totals
Change from base Build 473110477:	0.003%
Covered Lines:	17746
Relevant Lines:	20090

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💛 - Coveralls

[mdrichardson]

@chon219 Mind reviewing this? I'd like somebody from the adaptive side to make sure I'm not crazy, if possible. Note: the CI test failure is unrelated.