3PAR: Implement v2 replication (unmanaged)

3PAR: Implement v2 replication (unmanaged)

This patch implements the unmanaged side of v2 replication in the HPE
3PAR driver.

Both sync and periodic replication modes are supported. Each
replication_device entry should have a replication_mode value set
to sync|periodic.

A volume type extra_spec value of replication:mode
should also be set. If replication:mode is periodic,
replication:sync_period should be set as well. Which replication_device
entry(s) are used is determined by the value of replication:mode set for
each volume type.

cinder.conf should have the replication config group:

[3parfcrep]
hpe3par_api_url = http://10.10.10.10:8008/api/v1
hpe3par_username = user
hpe3par_password = pass
hpe3par_debug = False
san_ip = 10.10.10.10
san_login = user
san_password = pass
volume_backend_name = 3parfcrep
hpe3par_cpg = REMOTE_COPY_CPG2,REMOTE_COPY_CPG
volume_driver = cinder.volume.drivers.hpe.hpe_3par_fc.HPE3PARFCDriver
replication_device = target_device_id:eos7,
                     replication_mode:periodic,
                     cpg_map:REMOTE_COPY_CPG2:REMOTE_COPY_DEST2,
                     hpe3par_api_url:http://11.11.11.11:8008/api/v1,
                     hpe3par_username:user,
                     hpe3par_password:pass,
                     san_ip:11.11.11.11,
                     san_login:user,
                     san_password:pass

If we are working with iSCSI, the unmanaged replication device needs to
contain entries for the hpe3par_iscsi_ips as such:

[3pariscsirep]
hpe3par_api_url = https://10.10.10.10:8080/api/v1
hpe3par_username = user
hpe3par_password = pass
hpe3par_debug = False
hpe3par_iscsi_ips = 10.50.50.50,10.50.50.51
san_ip = 10.10.10.10
san_login = user
san_password = pass
volume_backend_name = 3pariscsirep
hpe3par_cpg = REMOTE_COPY_CPG2
iscsi_ip_address = 10.50.50.50
volume_driver = cinder.volume.drivers.hpe.hpe_3par_iscsi.HPE3PARISCSIDriver
replication_device = replication_mode:periodic,
                     target_device_id:eos16,
                     cpg_map:REMOTE_COPY_CPG2:REMOTE_COPY_DEST2,
                     hpe3par_api_url:https://11.11.11.11:8080/api/v1,
                     hpe3par_username:user,
                     hpe3par_password:pass,
                     san_ip:11.11.11.11,
                     san_login:user,
                     san_password:pass,
                     hpe3par_iscsi_ips:11.51.51.100 11.51.51.101,
                     iscsi_ip_address:11.51.51.100

Change-Id: I92bbe919c177e8242de8affad62f36a6edf7b0d7
Implements: blueprint hp-3par-v2-replication
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