Allow prompt-less install on low-resource systems

[Ayowel]

Make it possible to generate config unattended on low resource systems by bypassing prompts if SKIP_SOLR or SKIP_CLAMD is non-empty.
This was tested with the mailcow-ansiblerole repository with the following patch:

diff --git a/tasks/main.yml b/tasks/main.yml
index a1263f2..bf8825a 100755
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -28,6 +28,8 @@
     MAILCOW_HOSTNAME: "{{ mailcow__hostname }}"
     MAILCOW_TZ: "{{ mailcow__timezone }}"
     MAILCOW_BRANCH: "{{ mailcow__git_version }}"
+    SKIP_SOLR: "{{ mailcow__config_skip_solr }}"
+    SKIP_CLAMD: "{{ mailcow__config_skip_clamd }}"
   args:
     executable: /bin/bash
     chdir: "{{ mailcow__install_path }}"

[milkmaker]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[Ayowel]

This is not stale, please review/comment