Modified the language about the FluxtreamCapture app which appears when you try to add a FluxtreamCapture connector in Add Connectors dialog
Added null check on getApiKeyAttributesKeys
Added named query for apiKeys.all.byApi to allow asking for all the Connector instances in the system of a particular type.  This is needed for checking that the apiKeyAttributeKeys have been fully populated from the properties files.
Disabled sync for Zeo connector.  Modified behavior of checkKeysExist to exit server initialization if expected keys are missing entirely from the properties files.  Adding the keys with value 'xxx' will instead allow server initialization to continue and disable the affected connector.  Added a check that the apiKeyAttributeKeys for existing connector instances have been fully populated from the properties files.  If not, server initialization exits with a message to Check out fluxtream-admin-tools project, build, and execute 'java -jar target/flx-admin-tools.jar 5'
Added null check on getApiKeyAttributesKeys in createApiKey