check Linux bridge status before remove it
CLOUDSTACK-5042: fix NPE error as BroadcastUri is NULL in shared network after upgrade from 2.2.14
remove network limitation of nics on systemvms
CLOUDSTACK-5042: change cloud.keystore to cloudmanagementserver.keystore and install it
CLOUDSTACK-4996: Resolved gateway accessibility issue

Gateway of isolated network is pinged instead of shared
network
Signed-off-by: Girish Shilamkar <girish@clogeny.com>