* Remove cache after all roles run (#271)

We should free up space after the roles run to have green cluster state
in impotence step and enable Elasticsearch to allocate all indices.

Close #272

molecule/elasticstack_default/converge.yml

@@ -51,6 +51,11 @@
     - name: Install rsyslog
       ansible.builtin.package:
         name: rsyslog
+    - name: Remove cache # noqa: risky-shell-pipe
+      ansible.builtin.shell: >
+        if test -n "$(ps -p $$ | grep bash)"; then set -o pipefail; fi;
+        rm -rf /var/cache/*
+      changed_when: false
     - name: Configure rsyslog
       ansible.builtin.lineinfile:
         line: "*.* @@localhost:514"

roles/elasticsearch/tasks/main.yml

@@ -182,7 +182,6 @@
   ansible.builtin.shell: >
     if test -n "$(ps -p $$ | grep bash)"; then set -o pipefail; fi;
     rm -rf /var/cache/*
-  failed_when: false
   changed_when: false
   when: ansible_virtualization_type == "container" or ansible_virtualization_type == "docker"