mysql should support customize timeout when acquire lock.
Curently we only put 0, which will lead to in crush cases,
lock might releases after mysql socket timeout, which is long hrs.

Change-Id: I01aaff4af34b89fe82d985276ba356ce85a910de

Zookeeper does support TLS encryption and authentication for client
connections. There's no reason not to pass these arguments to the kazoo
to allow encrypted connections.

We bump minimum kazoo version to 2.6.0 since change implementin SSL support
has been merged with [1] and was first released with 2.6.0 tag.

[1] https://github.com/python-zk/kazoo/commit/35ce10669ace9d0d7e787793f0d4937d5d389f69

Change-Id: Ied29512989f477a19753afcb789e5588877fd688

since etcd3 3.5 dropped support for v3alpha and v3beta api, replacing
those with v3.

etcd3gw library supports passing api_path (v3alpha by default), but tooz
lacks such possibility and thus can not work with etcd3 3.5.

This patch adds handling of "api_version" in the options to
"ectd3+https" connection URLs (defaults to v3alpha as it is today and
corresponds to etcd3 version shipped in major LTS distros at the
moment).

Closes-Bug: #1983668
Depends-On: I49c480f573a4ba8294627a3ce730b816ded10aed
Change-Id: Ib30c1e003f261cd7e1ac6fed87167f9974bf8542

Whether 'was_deleted' was 'TRUE' or not, eventually we have to remove
self from '_acquired_locks'.
For example:
1. App #1 with coordinator 'A' wants to release lock "b"
2. 'self.coord.client.delete()' failed for some reason(.e.g,
BrokenPipeError,MemcacheUnexpectedCloseError)
3. According to the former logic,lock "b" will not remove
from "_acquired_locks", so "self.heartbeat()" will make it alive
forever until App #1 was down or lock "b" turned expired.
4. Now App #1 with coordinator 'A' wants to acquire lock "c", who
have the same lock-name with lock "b",It is clear that this will
fail and prevent the locked program from continuing to execute.

Change-Id: I6fc33b8e0a88510027bcfc30d1504489d2a91b4e

It can happen membership lease can be expired
to the moment of lease refreshing.
In this case heartbeat will try to refresh
expired lease forever without success.
The patch checks if lease expired and create new one.

Closes-Bug: 1975524
Depends-On: https://review.opendev.org/c/openstack/etcd3gw/+/843003
Change-Id: I5017724fd0134f3f0a51f059640e641dd9853ff2

Add run_watchers support to Etcd3Driver.

Raise NotImplemented during leader change watch methods
to let corresponding tests pass since only group
membership is supported

Closes-bug: #1968323
Change-Id: Ibd46a3697b59cd22f386e60d29649acc5c5cd88a