[Tests] Temp. disabled test NumLibODEIntTyped/0.T1

See #1989.

Tests/NumLib/TestODEInt.cpp

@@ -279,7 +279,12 @@ public:
 
 TYPED_TEST_CASE(NumLibODEIntTyped, TestCases);
 
+// Temporarily disabled for PETSc issue #1989
+#ifndef USE_PETSC
 TYPED_TEST(NumLibODEIntTyped, T1)
+#else
+TYPED_TEST(NumLibODEIntTyped, DISABLED_T1)
+#endif
 {
     TestFixture::test();
 }