Clean up and updates to Controller, Services and UrlMapping

bbb-lti/application.properties

bbb-lti/grails-app/conf/ApplicationResources.groovy

bbb-lti/grails-app/conf/BuildConfig.groovy

bbb-lti/grails-app/conf/Config.groovy

bbb-lti/grails-app/conf/DataSource.groovy

bbb-lti/grails-app/conf/UrlMappings.groovy

bbb-lti/grails-app/conf/lti.properties

...s-app/controllers/org/bigbluebutton/ToolController.groovy

...pp/services/org/bigbluebutton/BigbluebuttonService.groovy

...i/grails-app/services/org/bigbluebutton/LtiService.groovy

bbb-lti/grails-app/views/index.gsp

bbb-lti/grails-app/views/layouts/main.gsp

bbb-lti/src/java/org/imsglobal/json/IMSJSONRequest.java