Simplify OMD preparation with Makefile

[simonmeggle]

pack most configuration steps from the docs in to a Makefile.

[toschneck]

@simonmeggle maybe during this refactoring, the OMD now contains multiple check_sakuli definitions :-/

docker run -it consol/omd-labs-centos-sakuli:dev 
....
Reading configuration data...
   Read main config file okay...
Processing object config directory '/omd/sites/demo/etc/nagios/conf.d'...
Processing object config file '/omd/sites/demo/etc/nagios/conf.d/sakuli_nagios_objects.cfg'...
Processing object config file '/omd/sites/demo/etc/nagios/conf.d/traps.cfg'...
Processing object config file '/omd/sites/demo/etc/nagios/conf.d/notification_commands.cfg'...
Processing object config file '/omd/sites/demo/etc/nagios/conf.d/thruk_templates.cfg'...
Processing object config file '/omd/sites/demo/etc/nagios/conf.d/sakuli_nagios_check_mysql.cfg'...
Warning: Duplicate definition found for command 'check_sakuli' (config file '/omd/sites/demo/etc/nagios/conf.d/sakuli_nagios_check_mysql.cfg', starting on line 4)
Error: Could not add object property in file '/omd/sites/demo/etc/nagios/conf.d/sakuli_nagios_check_mysql.cfg' on line 5.
   Error processing object config files!

to fix this I temporally added the following ansible task:

- name: fix for Nagios config file
  shell: rm -f /opt/omd/sites/demo/etc/nagios/conf.d/sakuli_nagios_objects.cfg /opt/omd/sites/demo/etc/nagios/conf.d/sakuli_nagios_check_mysql.cfg

[simonmeggle]

Add documentation for all other components (db, gearman, ....)

[toschneck]

TODOs @simonmeggle:

• Disable TMPFS
• Ansible Playbooks for OMD Options: Grafana/PNP4/DB/GEARMAN/ScreenshotHistory
• Add commit hash to sakuli package in OMD build
• Update Doku (how to call the make file from Ansible dropin)

TODOs @toschneck:

• Build Dockerimages for different flavours based on German (Grafana PNP)