Log exceptions, raised during api
Log exceptions, raised during api

Before only error stats were updated. This commit adds logging call to
any exception catched during api call execution

Change-Id: I7ead92d27e53ddb5f59fbfcebc7e80b170bdbb18
Closes-Bug: #1435727

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