Unblock the Netvirt CSIT Issue from VPNManager

Unblock the Netvirt CSIT Issue from VPNManager

Issue:
=====

(1)
org.opendaylight.netvirt.vpnmanager-impl - 0.11.0.SNAPSHOT | SUBNETROUTE:
onInterfaceUp: Unable to handle interface up event for port
d92aa7f0-2b83-4bd0-860c-026e672a955c in subnet
5b33e49f-129b-4c53-9859-56304676bca7
java.lang.IllegalArgumentException: Multiple entries with same key:
SubnetToDpnKey{_dpnId=105707792905079}=SubnetToDpn{_dpnId=105707792905079,
_vpnInterfaces={VpnInterfacesKey{_interfaceName=d92aa7f0-2b83-4bd0-860c-026e672a955c}
=VpnInterfaces{_interfaceName=d92aa7f0-2b83-4bd0-860c-026e672a955c,
augmentation=[]}}, augmentation=[]} and
SubnetToDpnKey{_dpnId=105707792905079}=SubnetToDpn{getDpnId=105707792905079,
getVpnInterfaces={VpnInterfacesKey{_interfaceName=d92aa7f0-2b83-4bd0-860c-026e672a955c}
=VpnInterfaces{getInterfaceName=d92aa7f0-2b83-4bd0-860c-026e672a955c,
augmentation=[]}},
augmentation=[]}. To index multiple values under a key, use
Multimaps.index.at com.google.common.collect.Maps.uniqueIndex(Maps.java:1338)	~[bundleFile:?]
at com.google.common.collect.Maps.uniqueIndex(Maps.java:1293)~[bundleFile:?]
at org.opendaylight.yangtools.yang.binding.CodeHelpers.compatMap(CodeHelpers.java:296)
[bundleFile:?]at org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.l3vpn.rev130911.subnet.op.data
.SubnetOpDataEntryBuilder.setSubnetToDpn(SubnetOpDataEntryBuilder.java:356)
~[bundleFile:?]
at org.opendaylight.netvirt.vpnmanager.VpnSubnetRouteHandler .onInterfaceUp(VpnSubnetRouteHandler.java:625)
[bundleFile:?]

(2)
mainWorker=org.opendaylight.netvirt.vpnmanager.VpnInterfaceManager$$Lambda$2571/0x0000000101e1ec40@9e41c5d,
rollbackWorker=null, retryCount=3/3,
futures=[com.google.common.util.concurrent.ImmediateFuture$ImmediateFailedFuture@2c561c96[status=FAILURE,
cause=[java.lang.NullPointerException]],
com.google.common.util.concurrent.AbstractTransformFuture$TransformFuture@32bf6f0b[status=SUCCESS,
result=[null]],
com.google.common.util.concurrent.AbstractTransformFuture$TransformFuture@74a13a04[status=SUCCESS,
result=[null]]]}
java.lang.NullPointerException: null

Solution:
=========
(1)
Introduced new method to convert the List to Map before
building the subnetToDpn Map builder

(2) Changed proper adjacency check in vpninterfacemanager

Signed-off-by: Karthikeyan Krishnan <karthikeyangceb007@gmail.com>
Change-Id: Iec6ffb5e036c38cca83e1c78e85c21785e901730