TT#44197 Remove initial '/dev/' from swraiddisk1/swraiddisk2 boot options

The users can assign disks using the full path:
'swraiddisk1=/dev/sda' instead of expected 'swraiddisk1=sda'.
As a result the installation fails with not a user friendly errors.

Let's be more user friendly here and remove initial '/dev/' is available.

Change-Id: I094814433b294ca8f084b0412cb9b67537cba8cf

templates/scripts/includes/deployment.sh

@@ -375,10 +375,12 @@ fi
 
 if checkBootParam "swraiddisk1=" ; then
   SWRAID_DISK1=$(getBootParam swraiddisk1)
+  SWRAID_DISK1=${SWRAID_DISK1#/dev/}
 fi
 
 if checkBootParam "swraiddisk2=" ; then
   SWRAID_DISK2=$(getBootParam swraiddisk2)
+  SWRAID_DISK2=${SWRAID_DISK2#/dev/}
 fi
 
 # if TARGET_DISK environment variable is set accept it