catalog item id in GUI (clickable) and on REST

in REST API for EntitySummary and PolicySummary,
and in summary tab on GUI when available;
also better spacing and suppressing of absent/redundant information in entity-summary page
Fix JcloudsObjectStoreAccessorWriterTest
set entity RO status much earlier when known

mainly to enable suppression of log messages that are hugely noisy in read-only mode
improve logging for persistence and rebind

a few more detailed messages, including timings;
and lots of suppression of messages during redind-read-only
optimize rebind process

remove extraneous obj store lists+reads from process, and a bunch of code/redundancy tidy, and a bit more log tidy
minor code review cleanups for rebind/persistence logging
This closes #298
This closes #302
This closes #303
Trivial XML syntax error fixed.

Committing trivial fix directly to master. Minor XML syntax error - no
space between two attributes. Seems that most XML parsers didn't mind
this but a strict parser (e.g. xpath command on OSX) rejects it.