Add DB version requirements

Change-Id: I0ad75391efd06b9e7e1f10ec62cc8ca1ca17cf76

Documentation/database-setup.txt

diff --git a/Documentation/database-setup.txt b/Documentation/database-setup.txt
index 159966a..47fef6d 100644
--- a/Documentation/database-setup.txt
+++ b/Documentation/database-setup.txt
@@ -55,6 +55,8 @@
 [[createdb_mysql]]
 === MySQL
 
+Requirements: MySQL version 5.1 or later.
+
 This option is also more complicated than the H2 option. Just as with
 PostgreSQL it's also recommended for larger installations.
 
@@ -77,6 +79,8 @@
 [[createdb_mariadb]]
 === MariaDB
 
+Requirements: MariaDB version 5.5 or later.
+
 Refer to MySQL section above how to create MariaDB database.
 
 Visit MariaDB's link:https://mariadb.com/kb/en/mariadb/[documentation] for further