Fix jersey 2 WARNs in RestconfApplication
16:11:13 2018-05-31T16:08:28,928 | WARN | Blueprint Extender: 2 | Providers | 197 - org.glassfish.jersey.core.jersey-common - 2.25.1 | A provider org.opendaylight.netconf.sal.restconf.impl.ControllerContext registered in SERVER runtime does not implement any provider interfaces applicable in the SERVER runtime. Due to constraint configuration problems the provider org.opendaylight.netconf.sal.restconf.impl.ControllerContext will be ignored.
16:11:13 2018-05-31T16:08:28,929 | WARN | Blueprint Extender: 2 | Providers | 197 - org.glassfish.jersey.core.jersey-common - 2.25.1 | A provider org.opendaylight.netconf.sal.restconf.impl.BrokerFacade registered in SERVER runtime does not implement any provider interfaces applicable in the SERVER runtime. Due to constraint configuration problems the provider org.opendaylight.netconf.sal.restconf.impl.BrokerFacade will be ignored.
We shouldn't return ControllerContext and BrokerFacade as singletons.
Change-Id: I64aa7c6da97fa12f0203b8664d07c1af04f93c6b
Signed-off-by: Tom Pantelis <tompantelis@gmail.com>