If a node is notified of a schema change where the schema's dropped
columns have changes, that node will miss the changes to the dropped
columns. A scenario where this can happen is where a column c is
dropped, then added as a different typed, and then dropped again, with
a node n having seen the first drop and being notified of the
subsequent add and drop.
Fixes#2616
Signed-off-by: Duarte Nunes <duarte@scylladb.com>
Message-Id: <20170725170622.4380-1-duarte@scylladb.com>
33e18a1779