Changes done are:

- SHOW CREATE DATABASE use /*!80016 ... */ versioned comment
  to display DEFAULT ENCRYPTION clause introduced in wl12261.

- SHOW CREATE DATABASE uses /*!80016 ... */ versioed comment
  to display NOT ENFORCED clause.

- Slave checks if master is of version 80016 to perform constraint check.

- The code to print binlog event uses 80016 versioned comment.

- Bump IS_DD_VERSION to 80016 and adjust vesion comment.

- dd::Table DD object implementation uses 80016 to update constraint info.

- dd::Schema DD object implementation uses 80016 to update default encryption.

- Update version in upgrade function update_meta_data().

- Update encryption.database test to use 80016.

- Record test results after above change.

- Delete unused file ndb_wl12261.result.

Change-Id: I993dd4fe0b8f04f4b00dcc01f0972119f7586d03