HPE 3par - Peer Persistence - During attach volume, only one LUN id is returned

[Raghavendra Tilay]

Scenario:
During peer persistence, when volume is attached to instance, vlun is created on both primary & secondary arrays.

Sample output below:

pri array

snow cli% showvlun -v osv-ac2tdARMTlqma2gJzSpKQQ
Active VLUNs
Lun VVName HostName -Host_WWN/iSCSI_Name- Port Type Status ID
  0 osv-ac2tdARMTlqma2gJzSpKQQ bay04 5001438026E98444 0:0:2 host active 1
----------------------------------------------------------------------------------
  1 total

sec array

winter cli% showvlun -v osv-ac2tdARMTlqma2gJzSpKQQ
Active VLUNs
Lun VVName HostName -Host_WWN/iSCSI_Name- Port Type Status ID
  1 osv-ac2tdARMTlqma2gJzSpKQQ bay04 5001438026E98444 0:0:1 host standby 2
-----------------------------------------------------------------------------------
  1 total

Currently the FC driver code (hpe_3par_fc.py) returns only the LUN id from pri array (in variable 'target_lun').

Expected behaviour:
Both LUN ids should be returned (in variable 'target_luns').

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/cinder/+/901588