Fix bug introduced by #236

RM9709
Fix owner() policy check for networks

_remove_unauthorized_networks now covers the case when
tenant_id is None.

RM9376
RM9837

Adds support for Redis sentinels
RM9898

Adds redis SSL support.
remove test_models_sync migration test

Because these unit tests run against SQLite, it blocks
us using the more advanced features of modern, more
robust SQL data stores. Removing this test will prevent
this limitation from blocking us.
Merge pull request #241 from Cerberus98/rm9837_work

RM9837
Merge pull request #242 from TMaddox/remove_test_migrations_sync

remove test_models_sync migration test
Merge pull request #245 from asadoughi/9709_second_attempt

Fix bug introduced by #236
Merge pull request #246 from Cerberus98/master

RM9898
add composite primary key to quark_port_ip_address_associations
Merge pull request #248 from TMaddox/primary_key_quark_port_ip_address_associations_upstream

add composite primary key to quark_port_ip_address_associations
Ensure code will mark currently fully allocated subnets as full

- unit test that logic is setting next_auto_assign_ip to -1 when subnet is fully allocated
- functional tests validating the same
- fix subnet_find_allocation_count
    - was just ordering by used ip count, instead of what is remaining.
    - example, a /31 and /32 could both have 0 ips used, but their remaining is 2 and 4, so the /31 should be first returned
- use sqlalchemy desc (descending method) instead of string
- rename subnet_find_allocation_counts to subnet_find_orderd_by_full

RM8677
Merge pull request #247 from jmeridth/rm8677

Ensure code will mark currently fully allocated subnets as full
Quota fixes for plugin_modules/subnets.py

This is the now squashed commit of adding route_per_subnet logic
into plugin_modules/subnet.py, as well as adding new dns_nameservers
quotas. Unit tests included (RM9814 and RM9815)
RM9944

Adds connection pooling to standard and sentinel based connections
Merge pull request #249 from insequent/fix_for_500s

Fix for 500s
Merge pull request #251 from Cerberus98/rm9944_work

RM9944
Merge pull request #250 from asadoughi/9736

Fix owner() policy check for networks