Fix capitalization in Security Guide

Change-Id: I861da5aa8cf4eba2c785f6bdc9979e4994624dd6
Closes-Bug: #1253834
Configure metadata source for cloud-init

When building Ubuntu images the metadata source to be used by
cloud-initmust be explicitly set.

Change-Id: I30e3336cf65f8c1baed358efd78d90cde1d0cc02
Closes-Bug: #1250881
backport: havana
Merge "Fix capitalization in Security Guide"
Merge "Configure metadata source for cloud-init"
restructure operator training guides

cleaned up first chapters of the operator training guide. removed some left over files and duplicates.

implements bp/training-manuals

Change-Id: I0a5ef724836e87c5a7eddb4ed872353b346404e1
Merge "restructure operator training guides"
restructure first pass on developer and architect training guides

cleaned out old references and deleted old files

implements bp/training-manuals

Change-Id: I76184c572c1c9a2e8fe0e1ffcc5ea2d56d91219b
restructure operator training guide

adding the controller node structure with some minor changes to accommidate
the associate guide
added patch with whitespace cleanup

implements bp/training-manuals

Change-Id: I10db005b1acf8c2a7b9ac97c4e2cdc74d1db0528
restructure operator training guide

adding in the compute node structure. some modifiations to the associate guide and
controller node guide files.
patch update to remove whitespace

implements bp/training-manuals

Change-Id: I6d09c686575aa71da7765e6d3a00b910610807be
restructure operator training guide

note included associate review material as material to review rather
than new content

impelments bp/training-manuals

Change-Id: I3e2c866a5ddb2eb64f1b714d199de4cd359e5bc1
restructure associate training guide

remove excess whitespace

implements bp/training-manuals

Change-Id: I2532babc9013f59ac7e7aabc5a4d3cd8b2d411f3