Fix port mismatch and return value judgement issue

. the port of k8s plugin has changed from 8081 to 9015
. the value from 200 to 300 is acceptable from k8s plugin

Change-Id: I85c61d2275c7913f8c8dbeee0751349552bec29d
Issue-ID: MULTICLOUD-650
Signed-off-by: liboNet <libo.zhu@intel.com>
1 file changed