Update gateway.searchObjects to use LuceneQueryBuilder

Rather than have 2 implementations of the query parsing
logic, omero.gateway now uses the byLuceneQueryBuilder
method to have the custom query built server-side.
Add useAcquisitionDate param to searchObjects

Now the date query of byLuceneQueryBuilder can be based
on either the import date or the acquisitionDate by setting
the new parameter.
Enable common and model unit tests
Fix 'compile' error in parseTime
adding acquisition date to search form
adding acquisition date to the search result display
Update bin/omero search to use query builder
Refactor ids-only to HqlControl and call super

SearchControl was not properly making use of the HqlControl
_configure method. With this commit, all of the options from
HqlControl are also provided for regular search, including
output style and `--all` for querying across groups.
Set search.results in CLI context
Minor cleanups of search plugin
CLI search plugin integration tests
Fix flake8 errors
Exit prematurely on empty LQB search strings

Some searches like '%' generated empty strings in LQB
which led to invalid query exceptions "<EOF>" etc.
Ignore acquisition strings for non-images
Rename search result column name 'Object' -> 'Type'
Show Acquired and Imported dates in 2 columns
Batch annotate panel handles objects from different groups
'annotation' field includes file.name, file.contents etc
updating labels
Fix default date as 'Import date' and add tooltips