High: doc: Add pcs to man page example section

PCS and CRM SHELL now have their own example sections in the
resource-agent man pages.  Below is an example of the CRM SHELL
and PCS examples for the IPaddr2 agent.

EXAMPLE CRM SHELL
       The following is an example configuration for a IPaddr2 resource using the crm(8) shell:

           primitive p_IPaddr2 ocf:heartbeat:IPaddr2 \
             params \
               ip=string \
             op monitor depth="0" timeout="20s" interval="10s"

EXAMPLE PCS
       The following is an example configuration for a IPaddr2 resource using pcs(8)

           pcs resource create p_IPaddr2 ocf:heartbeat:IPaddr2 \
             ip=string \
             op monitor depth="0" timeout="20s" interval="10s"