Fix change to mysql COLLATION command

was missing file to sed.

Author: rouilj

.travis.yml

@@ -125,7 +125,9 @@ before_script:
 
   # HACK: workaround mysql bug: http://bugs.mysql.com/bug.php?id=74901
   #   needed for test_mysql.mysqlDBTest.testFilteringSpecialChars
-  - sed -i 's/CREATE DATABASE \%s/CREATE DATABASE \%s COLLATE utf8_general_ci/'
+  # plus others. Otherwise we get:
+  # COLLATION 'utf8_bin' is not valid for CHARACTER SET 'utf8mb4'
+  - sed -i 's/CREATE DATABASE \%s/CREATE DATABASE \%s COLLATE utf8_general_ci/' roundup/backends/back_mysql.py
 
   # build the .mo translation files and install them into a tree
   # (locale/locale under roundup directory root)