Currently, when debug-report.sh collects logs for the deployment,
it's tmp directory eats up massive storage space if pod logs are
collected for more than two hours of duration.
This fix will provide a new shell variable "LOG_DURATION" that gives
flexibilty to configure log duration of pods to restrict space crunch
on the node while report creation. Default value is set to 0s, means
collect all logs.
To enable the collection of all logs irrespective of duration, LOG_
DURATION should be set to 0s. LOG_DURATION can be in seconds(s),
minutes(m) or hours(h).
Change-Id: Ia80f37baca90f421cd0f543fc3a66e039df45323
b3533b8522