Fix bugs for installing docker, bug #1237581.
  -The change in install_docker.sh corrects a typo ('=' should be '-').
   This typo resutls in 'unable to locate the packet' error when executing apt-get.

  -The second change is in hypervisor-docker fix the error for reporting
   docker is not installed when docker is actually set up. The original line
   missed the version part of the package name.

Change-Id: Ic48f45158cf84f89080f095d53c355e9f6969bfd
XenAPI: Get pool default SR rather than "Local storage"

Match the nova default of using the Pool default SR as the storage for
VMs

Change-Id: I3b681ae7062ba0db3d9eab70b410b7d9658e37c9
exercices: aggregates needs to be more flexible

The actual regex checks a result in python format and
because of the change in the bug 1132961, Jekins failed.

I have update the regex to work with the old result
and the new result.

Change-Id: I393e1358f99be5f20d9ac8b3e214355a453ecfcb
Closes-Bug: 1239726
Merge "exercices: aggregates needs to be more flexible"
Merge "Fix bugs for installing docker, bug #1237581.   -The change in install_docker.sh corrects a typo ('=' should be '-').    This typo resutls in 'unable to locate the packet' error when executing apt-get."
Merge "XenAPI: Get pool default SR rather than "Local storage""