Sync glossary from openstack-manuals

Import these changes from openstack-manuals:
d9d76a3 Update glossary meta data
33a6998 Fix glossary generation
ca9f0c8 add the glossterm "Bell-LaPadula modela".
ecbe652 Add Kilo to the glossary
305f9b9 User name fixes
80aaa7b Unified the syntax of the XML root element (glossary)
0b490a0 Fix DOCTYPE for glossary
c633f28 Fix some wrong UTF-8 characters
ce1777c Consistent terminology for XX-as-a-Service
95c9b4c Correct incorrect uses of "weight" and "weighting"

Change-Id: Ic448e01d62a22ed5d292552cf568a17ce153b032