Do not parse out URS taxids from queries

[blakesweeney]

For some reason on the front end, the urs taxids in a query are parsed out. This causes an issue if there are more than one URS taxid as only the last one will be searched. For example given a query like: URS000013F331_9606 OR URS00003D2CC9_9606 only the last urs taxid will have results shown. It is possible to work around this by surrounding the query in () like (URS000013F331_9606 OR URS00003D2CC9_9606), but this is not user friendly. We should instead fix the parsing so we submit all urs taxids in the query and not just the last.

[carlosribas]

We had to insert the entry_type into the query after indexing other data types, so now we need to use parentheses to fix the logic.

Just for the record, here is an EBI Search query without using parentheses and here is the same query using parentheses