CLOUDSTACK-1340: Fix raw disk export using vbox internalcommand

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
CLOUDSTACK-1340: apt-get autoclean and then clean to remove cached debs

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>
CLOUDSTACK-1340: Fix locale, cmd, disk size and remove multiple apt-get installs

Signed-off-by: Rohit Yadav <bhaisaab@apache.org>