adjusted for the posibolity of lsblk not existing for fact gathering

lib/ansible/module_utils/facts.py

@@ -885,13 +885,14 @@ class LinuxHardware(Hardware):
                         size_available = statvfs_result.f_bsize * (statvfs_result.f_bavail)
                     except OSError, e:
                         continue
+
+                    uuid = 'NA'
                     lsblkPath = module.get_bin_path("lsblk")
+                    if lsblkPath:
                         rc, out, err = module.run_command("%s -ln --output UUID %s" % (lsblkPath, fields[0]), use_unsafe_shell=True)
 
                         if rc == 0:
                             uuid = out.strip()
-                    else:
-                        uuid = 'NA'
 
                     self.facts['mounts'].append(
                         {'mount': fields[1],