[POMBA] Move Data Router logs PVC to RWO

[POMBA] Move Data Router logs PVC to RWO

Data Router pods writes logs directly in the PVC within generic name
files:

debian@control01-onap-master:~$ ls -l /dockerdata-nfs/onap-pomba/pomba/data-router/logs/application.log
-rw-r--r-- 1 root root 125 Nov  5 09:56 /dockerdata-nfs/onap-pomba/pomba/data-router/logs/application.log
debian@control01-onap-master:~$ ls -l /dockerdata-nfs/onap-pomba/pomba/data-router/logs/
total 4
drwxr-xr-x 2 root root  76 Nov  5 09:56 AAI-DR
-rw-r--r-- 1 root root 125 Nov  5 09:56 application.log
drwxr-xr-x 3 root root  18 Nov  5 09:54 data-router
debian@control01-onap-master:~$ ls -l /dockerdata-nfs/onap-pomba/pomba/data-router/logs/data-router/
total 0
drwxrwxrwx 2 root root 6 Nov  5 09:54 logs
debian@control01-onap-master:~$ ls -l /dockerdata-nfs/onap-pomba/pomba/data-router/logs/data-router/logs/
total 0
debian@control01-onap-master:~$ ls -l /dockerdata-nfs/onap-pomba/pomba/data-router/logs/AAI-DR/
total 12
-rw-r--r-- 1 root root    0 Nov  5 09:56 audit.log
-rw-r--r-- 1 root root    0 Nov  5 09:56 debug.log
-rw-r--r-- 1 root root 7519 Nov  5 09:56 error.log
-rw-r--r-- 1 root root  666 Nov  5 09:56 metrics.log

Thus if two pods were writing, there would be issue as each one would
want to write.
Then this PVC must be used by one POD only and RWO is sufficent

Change-Id: I0087487fba715b4b0804de51544238f08fed1d3c
Issue-ID: LOG-1114
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>