Improve concept searching when a concept contains multiple matched concept names

@Test
public void getConcepts_shouldReturnASearchResultWhoseConceptNameContainsAWordWithMoreWeight() throws Exception {
	executeDataSet("org/openmrs/api/include/ConceptServiceTest-words.xml");
	Concept conceptWithMultipleMatchingNames = conceptService.getConcept(3000);
	//recalculate the weights just in case the logic for calculating the weights is changed
	conceptService.updateConceptIndex(conceptWithMultipleMatchingNames);
	conceptService.updateConceptIndex(conceptService.getConcept(4000));
	List<ConceptSearchResult> searchResults = conceptService.getConcepts("trust", Collections
		    .singletonList(Locale.ENGLISH), false, null, null, null, null, null, null, null);
		
	Assert.assertEquals(2, searchResults.size());
	//the first concept is the one with a word with the highest weight
	Assert.assertEquals(conceptWithMultipleMatchingNames, searchResults.get(0).getConcept());
	//This test would only pass in case the name selected in the query happens to have a lower concept name id than the others.
	//For conceptId=3000, its search result should ALWAYS match on 'TRUST ME' because it is shorter THAN 'TRUST ALWAYS'
	//so it has a higher weight hence giving this concept a higher weight when being compared to other concept hits.
	Assert.assertEquals(9998, searchResults.get(0).getConceptName().getConceptNameId().intValue());
}