[HBASE-1967] EC2 scripts; do not explicitly specify an ami in the config
[HBASE-1967] EC2 scripts; do not explicitly specify an ami in the config

git-svn-id: 25ca64b629f24bdef6d1cceac138f74b13f55e41@884458 13f79535-47bb-0310-9956-ffa450edef68

optimizely/hbase,StumbleUponArchive/hbase,ryanobjc/hbase,StumbleUponArchive/hbase,francisliu/hbase_namespace,lichongxin/hbase-snapshot,bcopeland/hbase-thrift,bcopeland/hbase-thrift,ryanobjc/hbase,StumbleUponArchive/hbase,bcopeland/hbase-thrift,bcopeland/hbase-thrift,ryanobjc/hbase,bcopeland/hbase-thrift,matteobertozzi/hbase,jyates/hbase,StumbleUponArchive/hbase,Shmuma/hbase-trunk,lichongxin/hbase-snapshot,bcopeland/hbase-thrift,StumbleUponArchive/hbase,matteobertozzi/hbase,jyates/hbase,francisliu/hbase_namespace,francisliu/hbase_namespace,ryanobjc/hbase,centiteo/hbase,StumbleUponArchive/hbase,matteobertozzi/hbase,matteobertozzi/hbase,bcopeland/hbase-thrift,optimizely/hbase,Shmuma/hbase-trunk,jyates/hbase,francisliu/hbase_namespace,francisliu/hbase_namespace,centiteo/hbase,matteobertozzi/hbase,lichongxin/hbase-snapshot,matteobertozzi/hbase,centiteo/hbase,ryanobjc/hbase,ryanobjc/hbase,cloudera/hbase,Shmuma/hbase-trunk,francisliu/hbase_namespace,centiteo/hbase,jyates/hbase,jyates/hbase,optimizely/hbase,Shmuma/hbase-trunk,matteobertozzi/hbase,lichongxin/hbase-snapshot,Shmuma/hbase-trunk,optimizely/hbase,centiteo/hbase,lichongxin/hbase-snapshot,francisliu/hbase_namespace,Shmuma/hbase-trunk,centiteo/hbase,StumbleUponArchive/hbase,francisliu/hbase_namespace,jyates/hbase,cloudera/hbase,jyates/hbase,jyates/hbase,lichongxin/hbase-snapshot,cloudera/hbase,cloudera/hbase,Shmuma/hbase-trunk,optimizely/hbase,matteobertozzi/hbase,optimizely/hbase,cloudera/hbase,jyates/hbase,cloudera/hbase,francisliu/hbase_namespace,centiteo/hbase,matteobertozzi/hbase