Minor defect - Missing period in error message

[SantiagoOrtegaBrcm]

When no authentication information is provided the resulting message is missing a period after the last sentence.

"The request has not been applied because it lacks valid authentication credentials. Full authentication is required to access this resource"

Note that the message is emitted from products consuming the message coming from Zowe, so solutions should consider more than just the sample request below.

            "messageContent": "The request has not been applied because it lacks valid authentication credentials. Full authentication is required to access this resource",                                                                                                            
           "messageInstanceId": "bdbfd633-369c-4f4e-87d7-7c7303e98084",
           "messageKey": "org.zowe.commons.rest.unauthorized",
           "messageNumber": "ZWEAS401",