sap_hana_install: Implement an SAP HANA installation check only feature

Fixes #844.

Signed-off-by: Bernd Finger <[email protected]>

roles/sap_hana_install/tasks/main.yml

@@ -10,6 +10,7 @@
     sap_hana_install_restrict_max_mem: "{{ sap_hana_install_mem_restrict | d(sap_hana_install_restrict_max_mem) }}"
   tags:
     - sap_hana_install_check_hana_exists
+    - sap_hana_install_check_installation
     - sap_hana_install_preinstall
     - sap_hana_install_set_log_mode
     - sap_hana_install_configure_firewall