Fix table 4.8 overlap in compute admin guide

fixes bug 1095098

the long string in this table was overlapping the central
column. This fix adds a line break and expands the column size
of the first column.

Change-Id: I91fb64337cc1a17223e162e66072abb5db3adac7
Adds fair warnings about LXC not recommended for use in production.

Fix bug 1088295

Patch set adds Thierry's suggested edits.

Change-Id: If9a215b90649110aaee8a5095c3874ad22a9f8f8
Merge "Adds fair warnings about LXC not recommended for use in production."