The PS adds changes which allow to count available OSDs and compare an amount
of "ready" OSDs with total quantity of OSDs. Also it allows to pass the check
if the amount of "ready" OSD is more then required ("required_percent_of_osds").
Otherwise, the check will fail (including the case when one or several pods
in the namespace are not ready after timeout.)
Change-Id: I3cf6dbc6393b62423ee5929167f03b8fc7bbac68
badfff4d19