db_rest Access-Control-Allow-Credentials header fix not available in this container

[lankester5]

The fix made to the trailing white space on the Access-Control-Allow-Credentials in src/main/java/org/openbmp/db_rest/RestResponse.java doesnt appear to to be available in the version of db_rest used in the all in one container.
This is causing some 503 errors from proxies that adhere strictly to the rfc on http

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Actually it seems that the db_rest master branch has the same error as was previously fixed. This error is in the RestResponse.java
the trailing space on the header needs to be removed from Access-Control-Allow-Credentials