Fix Assets app search to handle search for doc, docx, and pdf file content

In Assets app, users are unable to search for doc, docx, or pdf file content.

The query created (from SearchJcrContainer) is (for example):
select * from [nt:base] as t where (([jcr:primaryType] = 'mgnl:asset' or [jcr:primaryType] = 'mgnl:folder') and (lower(localname()) LIKE 'is a test%' or t.['is a test'] IS NOT NULL or contains(t.*, 'is a test')) )

but in JCR the file content is stored under mgnl:resource node type (see example attached). The test document used is also attached.

You are able to search for the file content by adding the mgnl:resource node type to the search query (example below, you can test in JCR Tools app).

select * from [nt:base] as t where (([jcr:primaryType] = 'mgnl:asset' or [jcr:primaryType] = 'mgnl:folder' or [jcr:primaryType] = 'mgnl:resource') and (lower(localname()) LIKE 'is a test%' or t.['is a test'] IS NOT NULL or contains(t.*, 'is a test')) )

An appropriate solution still needs to be determined and this ticket will need to be updated.