Enable db2 log rotatation

[marde16]

In the db2 tuning tasks there is a setting for db2 log rotation missing.

connections-automation/roles/third_party/ibm/db2-install/tasks/apply_tunings.yml

Lines 18 to 25 in 9eb050f

	with_items:
	- "db2set DB2_MINIMIZE_LISTPREFETCH=YES"
	- "db2set DB2_SELECTIVITY=YES"
	- "db2 update dbm cfg using MON_HEAP_SZ {{ __db2_instance_heap_size }}"
	- "db2stop force"
	- "db2start"
	when:
	- db2_tunings_already_applied.stat.exists == false

It must be activated for better control of the log size.

https://www.ibm.com/support/pages/db2-how-rotate-db2-diagnostic-file-db2diaglog

Please add db2 update dbm cfg using DIAGSIZE {{ __db2_instance_diag_size }} in the tuning file.

[pln-git4011]

Hi Martin, thank you for the feedback. Please submit a PR for this change and it will be merged into the Connections-Automation repository. Thanks again.