BaseCheckoutWizard*: Move createCommand from factory into Wizard

Change-Id: I0dcc931f279b59f0d6cf7afb553a2fed30baae7a
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
BaseCheckoutWizardFactory: Remove private class

Change-Id: Ia82a8cd8182e41ea88fdf98429c418a4016a1537
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Vcs: Use Utils::FileName where possible in the CheckoutWizards

Change-Id: I7e90f2c3468099229620d6713b39b69d8dbe8ff0
Reviewed-by: Orgad Shaneh <orgads@gmail.com>
Mercurial: Remove stale member variable

Change-Id: I1bbcf0237be333a4073d804ad39c899294dd05b9
Reviewed-by: Orgad Shaneh <orgads@gmail.com>