client_test: Add nmaster={1,2} to test matrix

Tests should work with both one master or more than one masters.

go/neo/client_test.go

@@ -436,9 +436,11 @@ func withNEOSrv(t *testing.T, f func(t *testing.T, nsrv NEOSrv), optv ...tOption
 		f(work)
 	}
 
-	// TODO + all variants with nreplica=X, npartition=Y, nmaster=Z, ... ?
+	// TODO + all variants with nreplica=X, npartition=Y, ... ?
 
 
+	for _, nmaster := range []int{1, 1} {
+
 		for _, ssl := range []bool{false, true} {
 			kind := ""
 			if ssl { kind = "ssl" } else { kind = "!ssl" }
@@ -446,7 +448,7 @@ func withNEOSrv(t *testing.T, f func(t *testing.T, nsrv NEOSrv), optv ...tOption
 			neoOpt := NEOSrvOptions{
 				name:    "1",
 				SSL:     ssl,
-			nmaster: 1,
+				nmaster: nmaster,
 			}
 
 			// startNEOpy starts NEO/py server with database in workdir/
@@ -536,6 +538,7 @@ func withNEOSrv(t *testing.T, f func(t *testing.T, nsrv NEOSrv), optv ...tOption
 				})
 			})
 		}
+	}
 }
 
 // withNEO tests f on all kinds of NEO servers connected to by NEO client with