ICM(testing): tee doesn't seem to work with azure fileshare

[khauser]

Using:

timestamp=$(date '+%Y-%m-%d_%H_%M_%S')
sh /intershop/bin/intershop.sh appserver  2>&1 | logger -s 2>>$HELM_DIRECTORY/server-logs/as${timestamp}.log

as docker command doesn't update last modified date when using an azure fileshare.

Maybe we should use logger instead.