Improved MySQL configuration parameters

Added innodb_file_per_table in the ubuntu my.cnf file.

Change-Id: Ib8172cbb7f709025e6f71aa197d7e844a70559a1
Closes-Bug: #1320814
small change to lab001-control-node

changed sentence removed the help of

Change-Id: I98c5fe2d33c6991c00526dca848b5bf58ce52b2d
Edited Services sections of Admin Guide

Edit wording; changed term/description lists to variable lists as per writing
conventions

backport: none
Partial-Bug: #1251195

Change-Id: I3b7f3fedafa79ab64f75260fcd3c5daa7cbb5e34
Merge "Improved MySQL configuration parameters"
Merge "small change to lab001-control-node"
Merge "Edited Services sections of Admin Guide"