With this commit, all the pregelix test cases have started failing (see the differences between [with this commit](https://travis-ci.org/uci-cbcl/genomix/builds/12749474) and [without this commit](https://travis-ci.org/uci-cbcl/genomix/builds/12749175). 

Perhaps the reason is related to the different base directory? the NullPointerException is caused when trying to iterate over `new File(PATH_TO_JOBS).listFiles()` in https://github.com/uci-cbcl/genomix/blob/genomix/fullstack_genomix/genomix/genomix-pregelix/src/test/java/edu/uci/ics/genomix/pregelix/JobRun/BasicGraphCleanTestSuite.java#L151