Adding alarm list filtering by state and meter

Adding alarm list filtering by state for SQLAlchemy, PyMongo and
HBase drivers
Adding alarm list filtering by meter only for SQLAlchemy and PyMongo
drivers.

Closes-Bug: #1224298

Change-Id: I393e2988142878d33363438671c240199ede65a4
remove default=None for config options

In the cfg module default=None is set as the default value.

Change-Id: I65786401354e5fb966339cbdb4a76f5f628b8d6f
Closes-Bug: #1323975
Merge "remove default=None for config options"
Merge "Adding alarm list filtering by state and meter"