Note that check only resource agent class is not enough. t is necessary to deal with a RA (resource agent) provider in dependency on value of RA class. The following commands produces invalid cib as well:

[vm-rhel72-1 ~pcs] $ pcs resource create R ocf:Dummy --force
[vm-rhel72-1 ~pcs] $ pcs resource create R2 lsb:heartbeat:Dummy --force

Class ocf requires provider while other class do not.

Created attachment 1246649 [details]
proposed fix

Tests are in the patch.

After Fix:

[vm-rhel72-1 ~] $ rpm -q pcs
pcs-0.9.156-1.el7.x86_64

[vm-rhel72-1 ~] $ pcs resource create R invalid:Dummy
Error: Invalid resource agent name 'invalid:Dummy'. Use standard:provider:type when standard is 'ocf' or standard:type otherwise. List of standards and providers can be obtained by using commands 'pcs resource standards' and 'pcs resource providers'

[vm-rhel72-1 ~] $ pcs resource create R ocf:Dummy
Error: Invalid resource agent name 'ocf:Dummy'. Use standard:provider:type when standard is 'ocf' or standard:type otherwise. List of standards and providers can be obtained by using commands 'pcs resource standards' and 'pcs resource providers'

[vm-rhel72-1 ~] $ pcs resource create R lsb:provider:Dummy
Error: Invalid resource agent name 'lsb:provider:Dummy'. Use standard:provider:type when standard is 'ocf' or standard:type otherwise. List of standards and providers can be obtained by using commands 'pcs resource standards' and 'pcs resource providers'

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:1958