Merge InnoDB 5.7 from mysql-5.7.9.

Contains also

MDEV-10547: Test multi_update_innodb fails with InnoDB 5.7

	The failure happened because 5.7 has changed the signature of
	the bool handler::primary_key_is_clustered() const
	virtual function ("const" was added). InnoDB was using the old
	signature which caused the function not to be used.

MDEV-10550: Parallel replication lock waits/deadlock handling does not work with InnoDB 5.7

	Fixed mutexing problem on lock_trx_handle_wait. Note that
	rpl_parallel and rpl_optimistic_parallel tests still
	fail.

MDEV-10156 : Group commit tests fail on 10.2 InnoDB (branch bb-10.2-jan)
  Reason: incorrect merge

MDEV-10550: Parallel replication can't sync with master in InnoDB 5.7 (branch bb-10.2-jan)
  Reason: incorrect merge

mysql-test/suite/innodb_zip/t/cmp_drop_table.test

@@ -0,0 +1,57 @@
+-- source include/have_innodb.inc
+-- source include/have_innodb_16k.inc
+
+let $per_table=`select @@innodb_file_per_table`;
+
+-- let $query_i_s = SELECT page_size FROM information_schema.innodb_cmpmem WHERE pages_used > 0
+
+set global innodb_file_per_table=on;
+ 
+create table t1(a text) engine=innodb key_block_size=8;
+
+-- disable_query_log
+
+# insert some rows so we are using compressed pages
+-- let $i = 10
+while ($i)
+{
+  insert into t1 values(repeat('abcdefghijklmnopqrstuvwxyz',100));
+  dec $i;
+}
+-- enable_query_log
+
+# we should be using some 8K pages
+-- eval $query_i_s
+
+drop table t1;
+
+# because of lazy eviction at drop table there should still be some
+# used 8K pages
+-- eval $query_i_s
+
+# create a non-compressed table and insert enough into it to evict
+# compressed pages
+create table t2(a text) engine=innodb;
+
+-- disable_query_log
+
+-- let $i = 500
+while ($i)
+{
+  insert into t2 values(repeat('abcdefghijklmnopqrstuvwxyz',1000));
+  dec $i;
+}
+
+-- enable_query_log
+
+# now there should be no 8K pages in the buffer pool
+-- eval $query_i_s
+
+drop table t2;
+
+#
+# restore environment to the state it was before this test execution
+#
+
+-- disable_query_log
+eval set global innodb_file_per_table=$per_table;