v2.5.1

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