Added availablePaths to LogicalUnit model

This is necessary for the iSCI multipath status oVirt/ovirt-engine#934

Signed-off-by: Brooklyn Dewolf <contact@brooklyn.gent>

src/main/java/types/LogicalUnit.java

@@ -33,6 +33,7 @@ public interface LogicalUnit {
     Integer lunMapping();
     Integer size();
     Integer paths();
+    Integer availablePaths();
     LunStatus status();
     String volumeGroupId();
     String storageDomainId();