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bumping timeouts for apiserver communication.

**What this PR does / why we need it**:
Our CI is failing due to timeouts. The times we set node names intersects with apiserver restarts, which can sometimes get caught up for longer than one minute. This is a temporary fix until we can decide on the best long-term solution.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #

**Special notes for your reviewer**:

**Release note**:

```release-note
Upped the timeout for apiserver communication in the juju kubernetes-worker charm.
```