Update GraphUtilTest.java

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Status Job ID Name Coverage
  Test
failed #10993
build

00:01:24

 
Name Stage Failure
failed
build Test
[ERROR] Please refer to /builds/eScience/gapIt/target/surefire-reports for the individual test results.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
ERROR: Job failed: exit code 1