Update HP3PAR client requirement

Changed hp3parclient minimum version requirement
to 2.0.

backport: havana

Fixes Bug 1242948

(cherry picked from commit d6b0142045111fe866ba9d300e59cbc5d28d1be2)

Change-Id: I7d1243350dffaa4ad7e5fb0e07787a859245e711
Install Guide: unreachable metadata service

Recommend installing a local metadata service on compute nodes on
RHEL, CentOS and Fedora.

backport: havana
Partial-Bug: 1243157
(cherry picked from commit ebb4f920300c2d9b71bf86396a8703a1d96270d6)

Change-Id: Ia836f9dffedcf2afb37e57b5f0f874b0dc23ea13
Merge "Update HP3PAR client requirement" into stable/havana
Merge "Install Guide: unreachable metadata service" into stable/havana