Merge pull request #576 from euanh/jenkins

jenkins: Add Jenkins Docker slave configuration files
Merge pull request #577 from euanh/jenkins

jenkins: Add CentOS 7 Dockerfile
Merge pull request #578 from euanh/jenkins

jenkins: Add wrapper scripts to run Docker containers
xapi depends on busybox

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Ensure XAPI looks in the right place for sm plugins

Conflicts:

	SPECS/xapi.spec

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Update to ezlvm v0.3 which can co-exist with Xapi sm

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Merge pull request #583 from djs55/more-fixes

Fix Xapi, ezlvm
jenkins: Use the epel-release package provided by CentOS

It is not necessary to download the epel-release RPM from
fedoraproject.org - it is in the CentOS repository.

Signed-off-by: Euan Harris <euan.harris@citrix.com>