Handle ValueError from hot_package
Handle ValueError from hot_package

translate_parameter method of hot_package converter may raise
ValueError exception. It should be handled and raise PackageLoadError.

Change-Id: Icd66da398dc7e2fc91802b3420e3f708f801a111
Closes-bug: #1450541

DavidPurcell/murano_temp,DavidPurcell/murano_temp,satish-avninetworks/murano,openstack/murano,satish-avninetworks/murano,NeCTAR-RC/murano,DavidPurcell/murano_temp,satish-avninetworks/murano,NeCTAR-RC/murano,sajuptpm/murano,olivierlemasle/murano,olivierlemasle/murano,NeCTAR-RC/murano,sajuptpm/murano,olivierlemasle/murano,DavidPurcell/murano_temp,olivierlemasle/murano,NeCTAR-RC/murano,satish-avninetworks/murano,openstack/murano