Automatic merge from submit-queue (batch tested with PRs 63138, 63091, 63201, 63341). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Set names for OpenStack loadbalancer members and monitors

**What this PR does / why we need it**:
This PR sets names for OpenStack loadbalancer members and monitors.
ATM names for members and monitors are empty, making it difficult to identify where they belong.

Healthmonitors will be named `monitor_<lb_name>_<index>` and members
will be named `member_<lb_name>_<index>_<node_name>`.
This naming scheme should in sync with the naming of other LB resources, e.g. pools: `pool_<lb_name>_<index>`.

**Release note**:

```release-note
NONE
```