All unit tests must pass in strict mode #891

The unit tests should yield the same result for default and strict mode parsing.
Tests may fail for the following reasons:

• The test data inadvertently does not include double quotes around some string values. These should be fixed.
• The test is specifically intended to test the parsing of unquoted chars. These should be omitted from the strict mode test run.
• The test has specific conditions (e.g. working with unquoted strings for CDL or XML testing) that are impacted by the strict mode parser changes.

The unit tests will be updated as a separate issue from #887 and #888. After merging the unit test fixes, the review of strict mode may continue.