qemurunner.py: Move some class variables that should only be local
The bootlog and qemusock variables were set in the class as part of the
create_socket() routine. However those variables are never used outside
of the same function and thus serve no purpose as class variables.
This initializes those variables near where they are used.
Signed-off-by: Randy Witt <randy.e.witt@linux.intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
