Docker image should return correct exit code, based on Java errors etc

[CpuID]

Had a misconfigured IAM role, expected a non-zero exit code (running processor mode under Jenkins, which would detect and email on failure). Returned a zero exit code, ideally this should return non-zero on any Java errors.

Example:

| Error     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
| Error     at java.lang.Thread.run(Thread.java:745)
| Error 2015-09-09 00:43:41,425 [localhost-startStop-1] ERROR BootStrap  - Startup failed
Message: failed to poll reservation prices for You are not authorized to perform this operation. (Service: AmazonEC2; Status Code: 403; Error Code: UnauthorizedOperation; Request ID: ......)
    Line | Method
->>  110 | init                             in com.netflix.ice.basic.BasicReservationService
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|     95 | <init>                           in com.netflix.ice.processor.ProcessorConfig
|    186 | doCall . . . . . . . . . . . . . in BootStrap$_closure1
|    327 | evaluateEnvironmentSpecificBlock in grails.util.Environment
|    320 | executeForEnvironment . . . . .  in     ''
|    296 | executeForCurrentEnvironment     in     ''
|    262 | run . . . . . . . . . . . . . .  in java.util.concurrent.FutureTask
|   1145 | runWorker                        in java.util.concurrent.ThreadPoolExecutor
|    615 | run . . . . . . . . . . . . . .  in java.util.concurrent.ThreadPoolExecutor$Worker
^    745 | run                              in java.lang.Thread
[root@server ~]# echo $?
0

Started using docker run .... syntax.