Bug 22974: Patron password update validation broken

Bug 22974: Patron password update validation broken

This patch adds back an include file to the change password template
which was inadvertently removed by Bug 21964. This broke Javascript
validation of the new password fields.

To test, apply the patch and enable the RequireStrongPassword system
preference.

 - Go to Patrons -> Patron details -> Change password.
 - Try entering a weak password in the "New password" field. You should
   get a validation error: "Password must contain at least 3 characters,
   including UPPERCASE, lowercase and numbers."
 - Try entering a password in the second password field which doesn't
   match the first. You should get a validation error: "Please enter the
   same password as above."

Signed-off-by: Liz Rea <wizzyrea@gmail.com>
Signed-off-by: Bin Wen <bin.wen@inlibro.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>