Various feature adds and bug fixes since 2.5.0

#241 Set jdk version to 8 #242 Fix javadoc errors #243 Fix javadoc errors #244 Replace the deprecated Eureka's DiscoveryManager #245 Switch builds to Travis #247 Fix dependency #248 Fix dependency #249 Fix dependency #251 Email validation update #253 Add event ID to list of chaos events #254 Use correct strategy name in default properties #255 Stop Conformity Monkey on destroy #256 Adding feature to specify resource types untaggedResource Rule #257 Make Conformity Monkey Notify Based on owner tag value #261 Updating Resources to have application/json content-type