CLOUDSTACK-2717: listCapabilities API to return
 allow.public.user.templates configuration parameter value
 defined at account level.
Signed by - Nitin Mehta<nitin.mehta@citrix.com>
Cleanup the marvin logger

It is useful to have the same logger used in the marvinplugin into the
testcase. The testcase can then append its name to the logger making
the logs specify exactly which test is executing when the logs are
generated

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
Include SSH retry logic when encountering channel failures.

Only on SSHExceptions we attempted retries, but during socket failures,
like Network Unreachable we failed the ssh connection immediately.

Signed-off-by: Prasanna Santhanam <tsp@apache.org>