Merge pull request #181 from SIT-DigiCre/fix/mattermost_channel_name_length

Fix mattermost channel name length

Author: ecto0310

schema/mattermost_remind_post.sql

@@ -1,8 +1,8 @@
 CREATE TABLE mattermost_remind_post
 (
     id           BINARY(16)  NOT NULL DEFAULT (UUID_TO_BIN(UUID())),
-    user_name    VARCHAR(16) NOT NULL,
-    channel_name VARCHAR(16) NOT NULL,
+    user_name    VARCHAR(255) NOT NULL,
+    channel_name VARCHAR(255) NOT NULL,
     body         TEXT        NOT NULL,
     remind_date  DATETIME    NOT NULL,
     posted       BOOLEAN     NOT NULL DEFAULT false,