Set lazy flag editing user

Signed-off-by: Samuel Cabrero <scabrero@zentyal.com>
Code format

Signed-off-by: Samuel Cabrero <scabrero@zentyal.com>
Disable the mail field of edit user form if mail module is enabled

When the mail module is installed, the user email field is disabled
to just show the email address. Any changes made to the account must
be done in the mail addon section.
Fix _accountExists search filter
Remove mail account management logic from edit user form

Account management must be done in the mail module user addon.
Add changelogs
Do not edit user's email field if mail module is installed
Set name attribute on delete mail account form
Merge branch 'scabrero/bug-1253'

Conflicts:
	main/samba/ChangeLog