* For the existing MMLGeneration...Tests, reference MathML has been generated
for mathoid and latexml within reference files in json.
* The creation of json files was done with JsonToMathML script
* The test-classes have been adapted a bit, so they can read the new reference files.
* MMLGenerationTexUtil test has export function for input
for maintenance-script for
Bug: T327388
Change-Id: I05a8c7bb5e37cf75faf09ec43e9ce2acc7bf2040
