Run test_rows_availability serially.
Run test_rows_availability serially.

Change-Id: Id87a209a614f889209456f8c0d9aedd8ad0e513f
Reviewed-on: http://gerrit.ent.cloudera.com:8080/3565
Reviewed-by: Nong Li <99a5e5f8f5911755b88e0b536d46aafa102bed41@cloudera.com>
Tested-by: jenkins

placrosse/ImpalaToGo,AtScaleInc/Impala,ImpalaToGo/ImpalaToGo,ImpalaToGo/ImpalaToGo,andybab/Impala,gistic/PublicSpatialImpala,andybab/Impala,ImpalaToGo/ImpalaToGo,AtScaleInc/Impala,placrosse/ImpalaToGo,andybab/Impala,gistic/PublicSpatialImpala,gistic/PublicSpatialImpala,placrosse/ImpalaToGo,andybab/Impala,AtScaleInc/Impala,andybab/Impala,AtScaleInc/Impala,placrosse/ImpalaToGo,ImpalaToGo/ImpalaToGo,gistic/PublicSpatialImpala,placrosse/ImpalaToGo,AtScaleInc/Impala,ImpalaToGo/ImpalaToGo,gistic/PublicSpatialImpala,gistic/PublicSpatialImpala,AtScaleInc/Impala,placrosse/ImpalaToGo,ImpalaToGo/ImpalaToGo,andybab/Impala