Properly handle SQL statements of form UPDATE....SELECT
fix falling tests for column strategy introduced probably in #246
Update to ES 1.2.2, reducing copy code

The update to ES 1.2.2 includes the more stable ES support plugin
1.2.2.0.
Three new hook method in Feeder: beforeTask(), afterTask(), and fetch().
The feeder code doubling in ColumnRiverFeeder is reduced.
preparing for 1.2.2.0 release