Don't use printStackTrace() on exceptions.

...a/net/floodlightcontroller/firewall/FirewallResource.java

.../floodlightcontroller/firewall/FirewallRulesResource.java

...htcontroller/notification/NotificationManagerFactory.java

...er/staticflowentry/web/StaticFlowEntryPusherResource.java

src/main/java/org/openflow/protocol/OFMatchBeanInfo.java

...odlightcontroller/core/internal/OFChannelHandlerTest.java

...net/floodlightcontroller/core/util/SingletonTaskTest.java

...a/net/floodlightcontroller/debugevent/DebugEventTest.java

.../java/net/floodlightcontroller/firewall/FirewallTest.java