QAR-751 : Merge Agent Inventory Services - Fetch Inventory and Fetch Inventory Descendents - to Release

Related Jiras:
1. DEV-17797 New Top Causes of Inventory Loss is Attachments with null folder_id
2. DEV-17937 null asset id not handled correctly in ais inventory fetch
3. OPSRT-1097 Update python-indra package on the system images
4. DEV-20505 QAR-751: Banning Cap "FetchLibDescendents" results in error in viewer log.
5. DEV-20328 QAR-751 Excessive log spam when using ais viewer against ais sim
6. DEV-20335 QAR-751 AIS bans are missing from message.xml

svn merge -r95983:96590 svn+ssh://svn/svn/linden/branches/ais-for-merge-qar-751 .

Miscellaneous commit:
1. Fixed silly bug in llsd-rest that broke connects to https on a non-standard port