Add support for volumes backed by Dell EqualLogic

This change set adds support for using Dell EqualLogic arrays
as a backend for Cinder.

Change-Id: I137d2f71a9fc69c0082fdad5cd5100eb232dfdd7
Use lioadm as iscsi helper on RHEL 7

On RHEL 7 it is necessary to use lioadm as iscsi_helper. This patch handles
proper configuration and appropriate package installation.

Change-Id: Ic3a41015c95f0b5f394d0c4b58dfc0eb10d5037d
4.0.0 - 2014.1.0 - Icehouse Release

Updated Modulefile and README.md for 4.0.0 release.

Change-Id: If2b460aa971fb29b426298d8b70ab2099690059d
Merge "Use lioadm as iscsi helper on RHEL 7"
Merge "Add support for volumes backed by Dell EqualLogic"
Merge "4.0.0 - 2014.1.0 - Icehouse Release"
Update puppetlabs-rabbitmq dependency

Cinder can now use puppetlabs-rabbitmq < 4. Updated the dependency
to reflect this change.

Change-Id: I3ee14ae7b3535ce2e58dc05594fc141bd013daa1