CLOUDSTACK-6601: added "forDisplay" parameter to listLoadBalancerRules API
CLOUDSTACK-6593: Connectivity service capabilites should be matched with
the provider only if at least one capability is specified

Fix avoids the check, and only if the createNetworkOffering
'StrechedL2'Subnet' capability is specified then it should match against
'Connectivity' service provider
Revert "CLOUDSTACK-3272 Fixing NullPointerException for alerts"

This reverts commit 882bf079fa1886c9feab0948066a02c1cb6cd86a.