Bug #27690593: CHANGE TYPE OF MYSQL.DD_PROPERTIES.PROPERTIES TO MEDIUMBLOB

Since the table definition of 'mysql.dd_properties' should not change
after 8.0 GA, this patch is needed to avoid a future dependency on utf8.

Change-Id: I32d968cc1c1d95ab1ed0f96f8bdbfa8243ac6390

Author: ssorumgard

mysql-test/r/dd_schema_definition_debug.result

@@ -268,7 +268,7 @@ columns	CREATE TABLE `columns` (
 SHOW CREATE TABLE mysql.dd_properties;
 Table	Create Table
 dd_properties	CREATE TABLE `dd_properties` (
-  `properties` mediumtext COLLATE utf8_bin
+  `properties` mediumblob
 ) /*!50100 TABLESPACE `mysql` */ ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0 ROW_FORMAT=DYNAMIC
 SHOW CREATE TABLE mysql.events;
 Table	Create Table

mysql-test/std_data/dd_upgrade_test_jsons.zip

@@ -547,10 +547,10 @@ INSERT INTO dd_published_schema
     'f607ab08b2d2b2d93d8867ad75116655d9c942647245d7846be440ec916c440f');
 INSERT INTO dd_published_schema
   VALUES ('80011', 0,
-    '78718cc3e520fdfcaa82ec1b21d11d4b604b27c3f97a9f3ec4ed214a7ba0232c');
+    'e849364aeb724ff89f9d4d01bea6e933b9f0ef5087b4098a83acbe584a2f0702');
 INSERT INTO dd_published_schema
   VALUES ('80011', 1,
-    '56729f3744c0f7400aa45ffa02af97676a27db7903ae79dc3660c5e32c016de9');
+    'ac9e620d1fcd8389cce7660c7f7bbc0acbe3a31fd52799ef8816981bf6de73fd');
 
 SELECT IFNULL(CONCAT('The schema checksum corresponds to DD version ',
                      version, '.'),

mysql-test/std_data/innodb_sdi_jsons.zip

@@ -59,7 +59,7 @@ DD_properties::DD_properties() : m_properties() {
   m_target_def.set_table_name("dd_properties");
 
   m_target_def.add_field(FIELD_PROPERTIES, "FIELD_PROPERTIES",
-                         "properties MEDIUMTEXT");
+                         "properties MEDIUMBLOB");
 
   m_target_def.add_populate_statement(
       "INSERT INTO dd_properties (properties)"