fix building Or iterator, add test

query/gremlin/build_iterator.go

@@ -128,7 +128,7 @@ func buildPathFromObject(obj *otto.Object) *path.Path {
 		if subobj == nil {
 			return nil
 		}
-		return p.And(buildPathFromObject(subobj))
+		return p.Or(buildPathFromObject(subobj))
 	case "Back":
 		if len(stringArgs) != 1 {
 			return nil

query/gremlin/gremlin_test.go

@@ -186,6 +186,13 @@ var testQueries = []struct {
 		`,
 		expect: []string{"charlie"},
 	},
+	{
+		message: "test Or()",
+		query: `
+			g.V("bob").Out("follows").Or(g.V().Has("status", "cool_person")).All()
+		`,
+		expect: []string{"fred", "bob", "greg", "dani"},
+	},
 
 	// Gremlin Has tests.
 	{