Fixes for CREATE_OR_REPLACE

- MDEV-5587 Server crashes in Locked_tables_list::restore_lock on CREATE OR REPLACE .. SELECT under LOCK
- MDEV-5586 Assertion `share->tdc.all_tables.is_empty() || remove_type != TDC_RT_REMOVE_ALL' fails in tdc_remove_table
- MDEV-5588 Strange error on CREATE OR REPLACE table over an existing view

mysql-test/r/create_or_replace.result:
  Added test cases
mysql-test/r/lowercase_view.result:
  New error message
mysql-test/r/merge.result:
  New error message
mysql-test/r/multi_update.result:
  New error message
mysql-test/r/subselect.result:
  New error message
mysql-test/r/subselect_exists_to_in.result:
  New error message
mysql-test/r/subselect_no_mat.result:
  New error message
mysql-test/r/subselect_no_opts.result:
  New error message
mysql-test/r/subselect_no_scache.result:
  New error message
mysql-test/r/subselect_no_semijoin.result:
  New error message
mysql-test/r/view.result:
  New error message
mysql-test/suite/funcs_1/r/myisam_views-big.result:
  New error message
mysql-test/t/create_or_replace.test:
  New tests
mysql-test/t/view.test:
  New error message
sql/share/errmsg-utf8.txt:
  Added new error message
sql/sql_base.cc:
  Updated error message
  Do an automatic UNLOCK TABLES if we don't have any locked tables (safety fix)
sql/sql_db.cc:
  Updated arguments
sql/sql_load.cc:
  New error message
sql/sql_parse.cc:
  Check that we are not using a table we are dropping and re-creating
sql/sql_table.cc:
  Added parameter to mysql_rm_table_no_locks() to not automaticly do UNLOCK TABLES
  Added better error message if trying to drop a view with DROP TABLE
  Don't try to create something we select from
sql/sql_table.h:
  Updated prototypes

sql/sql_table.h

@@ -238,7 +238,7 @@ bool mysql_rm_table(THD *thd,TABLE_LIST *tables, my_bool if_exists,
                     my_bool drop_temporary);
 int mysql_rm_table_no_locks(THD *thd, TABLE_LIST *tables, bool if_exists,
                             bool drop_temporary, bool drop_view,
-                            bool log_query);
+                            bool log_query, bool dont_free_locks);
 bool quick_rm_table(THD *thd, handlerton *base, const char *db,
                     const char *table_name, uint flags);
 void close_cached_table(THD *thd, TABLE *table);