Update common role

[Kirk-Koelzer]

Each role needs to be checked and update any ansible modules or tasks that are deprecated, failing or giving warnings.

[koelslaw]

• TASK [common : Disable IPv6 for all interfaces] ****************************************************************
  [WARNING]: The value 1 (type int) in a string field was converted to u'1' (type string). If this does not look
  like what you expect, quote the entire value to ensure it does not change.
  changed: [simplerockbuild.simplerock.lan]

• TASK [common : Configure RockNSM online repos] *****************************************************************
  changed: [simplerockbuild.simplerock.lan] => (item={u'gpgcheck': True, u'name': u'rocknsm_2_5', u'baseurl': u'https://packagecloud.io/rocknsm/2_5/el/7/$basearch'})
  changed: [simplerockbuild.simplerock.lan] => (item={u'gpgcheck': False, u'name': u'rocknsm_2_5-source', u'baseurl': u'https://packagecloud.io/rocknsm/2_5/el/7/SRPMS'})
  [WARNING]: The value 750 (type int) in a string field was converted to u'750' (type string). If this does not
  look like what you expect, quote the entire value to ensure it does not change.
  [WARNING]: The value 300 (type int) in a string field was converted to u'300' (type string). If this does not
  look like what you expect, quote the entire value to ensure it does not change.

• TASK [common : Create RockNSM control script symlink] **********************************************************
  [WARNING]: Cannot set fs attributes on a non-existent symlink target. follow should be set to False to avoid
  this.
  changed: [simplerockbuild.simplerock.lan]

[koelslaw]

closed, duplicate of #565