They are useful for case we install several back ends with different
drivers, their modes and capabilities.
New share types have fixed names based on driver modes:
- dhss_true
- dhss_false
It is possible to define their extra specs using following env vars:
- MANILA_DHSS_TRUE_SHARE_TYPE_EXTRA_SPECS
- MANILA_DHSS_FALSE_SHARE_TYPE_EXTRA_SPECS
that defaults to existing following env var:
- MANILA_DEFAULT_SHARE_TYPE_EXTRA_SPECS
Use case in CI: we are able to use more than one predefined share_type
in tempest and rally tests.
Change-Id: I7278a897bb89f0562e1eda449b725d965cb10566