mon: use dump_bool in pool_get command

Signed-off-by: Chang Liu <liuchang0812@gmail.com>
(cherry picked from commit 8372333)

src/mon/OSDMonitor.cc

@@ -4778,9 +4778,8 @@ bool OSDMonitor::preprocess_command(MonOpRequestRef op)
 	  case WRITE_FADVISE_DONTNEED:
 	  case NOSCRUB:
 	  case NODEEP_SCRUB:
-	    f->dump_string(i->first.c_str(),
-			   p->has_flag(pg_pool_t::get_flag_by_name(i->first)) ?
-			   "true" : "false");
+	    f->dump_bool(i->first.c_str(),
+			   p->has_flag(pg_pool_t::get_flag_by_name(i->first)));
 	    break;
 	  case HIT_SET_PERIOD:
 	    f->dump_int("hit_set_period", p->hit_set_period);