Despite having the src_type paremeter for the storage_pool dictionary as
a mandatory parameter, the value is not being used to filter the volumes
to migrate, using only 'src_pool'.
This change makes 'src_type' optional, since it was ignored until this
point, making it optional keeps the same behaviour by default. If
'src_type' is in the audit parameters, the strategy uses both 'src_pool' and
'src_type' to filter the volumes to migrate.
Closes-Bug: 2111507
Change-Id: Id83a96de85ada1ae6c0e25f8b7fcf54034604911
Signed-off-by: jgilaber <jgilaber@redhat.com>
cb6fb16097