Lots of minor changes in REST API methods.

src/main/java/org/nrg/xapi/rest/JsonYamlRestValidator.java

src/main/java/org/nrg/xapi/rest/dicomscp/DicomSCPApi.java

src/main/java/org/nrg/xapi/rest/event/EventHandlerApi.java

...ava/org/nrg/xapi/rest/notifications/NotificationsApi.java

src/main/java/org/nrg/xapi/rest/settings/SiteConfigApi.java

src/main/java/org/nrg/xapi/rest/theme/ThemeApi.java

src/main/java/org/nrg/xapi/rest/users/UsersApi.java

src/main/java/org/nrg/xnat/configuration/WebConfig.java

src/main/java/org/nrg/xnat/initialization/RootConfig.java

src/main/webapp/WEB-INF/conf/log4j.properties