Fixed search options. The parameter is not 'options' but 'q.options', as specified in https://docs.aws.amazon.com/cloudsearch/latest/developerguide/search-api.html#search-request-parameters
Added unit test for options -> q.options fix
Merge branch 'develop' into 2.31.1-cloudsearch2-options

Conflicts:
	tests/unit/cloudsearch2/test_search.py
Merge pull request #2420 from N3TWORK/2.31.1-cloudsearch2-options

Fixed CloudSearch options argument. Fixes #2420.