SolrDisMaxQuery boost query test case
Implement Request #68384: Allow Switching between DisMax and EDisMax query parsers

New Methods Introduced in SolrDisMaxQuery:
SolrDisMaxQuery SolrQuery::useDisMaxQueryParser()
SolrDisMaxQuery SolrQuery::useEDisMaxQueryParser()
To Allow switching between query parsers
Fix unit tests that depends on defType of SolrDisMaxQuery