Fixes

* Use Fuel corosync from 5.1.1
* Fixes in docs
* Fix fence policy evaluation in site.pp
* Fix yaml parsing in site.pp
* Add missing parser functions and facts
* Del inifile copy from pre-build-hooks
* Add pre-build hook for dependencies:
  * puppetlabs/stdlib v 4.5.0
  * Fuel corosync v 5.1.1
* Do not run rspecs for corosync module from Fuel

Change-Id: Iaa764ee40dd6fd41cafe72bcaefb9b9bf9b06f94
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>
Fix tests and provided_by

Note, that pcs_fincing rspecs could be run only after the
plugin have been built and dependent puppet modules
(corosync, stdlib) downloaded from Fuel by pre build hook

Change-Id: I505bee27a7886b28f0cf79490a32ac919ed9fc47
Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>