Adding decorator to raise ApplicationError
Change-Id: Iadeece8e3acfac3b8ebd039d2c1d132ac60a89a7
Signed-off-by: 
Gulsum Atici <gulsum.atici@canonical.com>
Change-Id: Iadeece8e3acfac3b8ebd039d2c1d132ac60a89a7
Signed-off-by: Gulsum Atici <gulsum.atici@canonical.com>