GEOMESA 320, use apache commons csv

* replaced usage of javacsv with 1.0 release of apache commons csv in geomesa-tools
* updated test to ensure wkt still works with commons csv
* updated pom
Update GenerateKNNQueryTest to deal with the removal of FilterToAccumulo, and lower k for one of the tests in KNearestNeighborSearchProcessTest.
Merge branch 'accumulo1.5.x/1.x' of github.com:locationtech/geomesa into f_knn_search
Another tweak to KNearestNeighborSearchProcessTest for speed.