Use mklink under Windows

In order to support in-place importing on Windows, mklink
rather than ln must be used. Rather than create new commands
like `--transfer=mklink`, the same flags (`ln` and `ln_s`)
are being used.
Fixes from jh713@cam.ac.uk

 * cmd /c is needed to call mklink from Java
 * Arguments need reversing.
Close file handle before attempting delete

@bpindelski showed that on Windows the UUID-containing
file created by checkLocation was not being properly
deleted during import. This change closes the RawFileStore
and then re-opens in order to allow in-place import under
Windows.
Remove ManagedRawFileStoreI in favor of callbacks

ManagedRawFileStoreI was not being used which meant that
closeCalled was never invoked and therefore the proxies
in `ManagedImportProcessI.uploaders` were never cleaned.
This led to `ObjectNotExistException` being thrown on a
second loading of `proc.getUploader(i)`. Rather than add
logic to create the correct subclass of RepoRawFileStoreI,
a callback interface has been added which can be used for
any implementation.

Conflicts:
	components/blitz/src/ome/services/blitz/repo/RepoRawFileStoreI.java
Add 'omero.import.active_close' system property

The primary blocker for this PR as a feature for 5.0.3
was that it broke compatibility with 5.0.2 servers and
earlier. Now the active closing functionality which is
needed for in-place import on Windows is *disabled* by
default, and needs to be activated via:

```
JAVA_OPTS=-Domero.import.active_close=true bin/omero...
```
Fix typo
Clarify checkLocations's error conditions

In order to prevent confusing messages after a
`FileUtils.deleteQuietly()`, we actively throw
an exception for all the in-place import types.
Improve messages on in-place failure conditions
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