Making source a text field rather than a varchar to avoid potential length limitations

http://bugs.koha-community.org/show_bug.cgi?id=7977
Signed-off-by: Mason James <mtj@kohaaloha.com>

installer/data/mysql/kohastructure.sql

@@ -2838,7 +2838,7 @@ CREATE TABLE ratings (
 DROP TABLE IF EXISTS quotes;
 CREATE TABLE `quotes` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
-  `source` varchar(45) DEFAULT NULL,
+  `source` text DEFAULT NULL,
   `text` mediumtext NOT NULL,
   `timestamp` datetime NOT NULL,
   PRIMARY KEY (`id`)

installer/data/mysql/updatedatabase.pl

@@ -5252,7 +5252,7 @@ if ( C4::Context->preference("Version") < TransformToNum($DBversion) ) {
         $dbh->do( qq{
             CREATE TABLE `quotes` (
               `id` int(11) NOT NULL AUTO_INCREMENT,
-              `source` varchar(45) DEFAULT NULL,
+              `source` text DEFAULT NULL,
               `text` mediumtext NOT NULL,
               `timestamp` datetime NOT NULL,
               PRIMARY KEY (`id`)