osd: Optimized EC missing call to apply_pwlc after updating pwlc

osd: Optimized EC missing call to apply_pwlc after updating pwlc

update_peer_info was updating pwlc with a newer version received
from another shard, but failed to update the peer_info's to
reflect the new pwlc by calling apply_pwlc.

Scenario was primary receiving an update from shard X which had
newer information about shard Y. The code was calling apply_pwlc
for shard X but not for shard Y.

The fix simplifies the logic in update_peer_info - if we are
the primary update all peer_info's that have pwlc. If we
are a non-primary and there is pwlc then update info.

Signed-off-by: Bill Scales <bill_scales@uk.ibm.com>
(cherry picked from commit d19f3a3bcbb848e530e4d31cbfe195973fa9a144)