bugfix: SubmitOnly feature does not require id_rsa

This feature required that the private ssh key of the vmchecker is
usable by www-data. The fix uses the assumption that the storer and the
vmchecker are on the same machine. This assumption is made in several
places throughout this project.

Signed-off-by: Lucian Cojocar <cojocar@gmail.com>
paramiko: create log in a writable folder

Signed-off-by: Lucian Cojocar <cojocar@gmail.com>
web_services: callback: define VMCHECKER_HOME in apache conf

If HOME variable is not defined (which can happen depending on the setup)
then the callback functions will fail because the search path for the key is
relative to this variable.

Signed-off-by: Lucian Cojocar <cojocar@gmail.com>
vmchekcer: translate some messages to english

Signed-off-by: Lucian Cojocar <cojocar@gmail.com>
gwt: update login form comms

Signed-off-by: Lucian Cojocar <cojocar@gmail.com>
gwt: XXX: hide language selection box