feat: passive runner deletion (#294)

* step down ordering

* chore: refactor SSH connection getter

* chore: refactor health check

* chore: add timeout

* chore: pass connection and server name

* test: rename get_ssh_connections -> get_ssh_connection

* gitignore development artefact

* refactor health check to static method

* test: add unit tests for SSH health checks

* ssh health check refresh server on fail

* remove debug line

* enable openstack integration test

* Revert "enable openstack integration test"

This reverts commit 9b4678e.

* fix unit test messages

.gitignore

@@ -5,6 +5,11 @@ placeholders/
 *.charm
 build/
 .coverage
+
+# testing artifacts
 lxd-profile.*
 tinyproxy.conf
+
+# development artifacts
 clouds.yaml
+.vscode/