strands_executive: 0.0.15-1 in 'hydro/distribution.yaml' [bloom]

Increasing version of package(s) in repository `strands_executive` to `0.0.15-1`:

- upstream repository: https://github.com/strands-project/strands_executive.git
- release repository: https://github.com/strands-project-releases/strands_executive.git
- distro file: `hydro/distribution.yaml`
- bloom version: `0.5.12`
- previous version for package: `0.0.14-0`

## scheduler

- No changes

## scipoptsuite

- No changes

## sim_clock

- No changes

## strands_executive_msgs

- No changes

## task_executor

```
* Added sanity checking to task routine.
* Handle case where action server for task does not exist
* Contributors: Nick Hawes
```

## wait_action

- No changes