Fixed syntax error for ansible v2

Fixed syntax errors from ansible v2, Chris, please merge it, I'll start another branch.

See merge request !14

Fixed SSH host key ECDSA

Fixed SSH host key ECDSA for CentOS 6 build. Chris, please merge it, I'll create another branch for fixing ansible v2 other issues

See merge request !13

Addcvlsmbclient

Add samba client package requested by ticket 8133

See merge request !12

disable bdb log files

Disable bdb log files to fix filling up disk space.

See merge request !11

Fixed ldap password to no-expiry

Merge request for fixing ldap password to no-expiry

See merge request !10

Compatability with ansible2 and add a role to create a sudo enabled group

See merge request !7

Master

Mellanx drivers reboot did not work. Converted "command:" to "shell:"
Need new drivers for new kernel version

See merge request !6

simon grabbed latest version for due diligence

set the mode correctly on slurm job submission

remove all yum updates and apt-get upgrades except from roles specifi…

remove all yum updates and apt-get upgrades except from roles specifically designed to do this eg apt-get upgrade role