[MINOR] Remove unneded repos from root pom.
[MINOR] Remove unneded repos from root pom.

Also a minor indentation fix.

Author: Marcelo Vanzin <vanzin@cloudera.com>

Closes #109 from vanzin/pom-cleanup.

ajbozarth/incubator-livy,ajbozarth/incubator-livy,ajbozarth/incubator-livy,ajbozarth/incubator-livy,ajbozarth/incubator-livy,meisam/incubator-livy,meisam/incubator-livy,ajbozarth/incubator-livy,meisam/incubator-livy,meisam/incubator-livy,meisam/incubator-livy,meisam/incubator-livy