Update error asserts and RUNPATH

The error messages from ERT has changed, thus, the test code that assert for specific
error strings must be updated.

Also update the RUNPATH syntax to avoid use of %d formatting tokens, which
causes warnings

tests/jobs/rft/test_gendata_rft.py

@@ -532,7 +532,7 @@ def test_ert_setup_one_well_one_rft_point(tmpdir):
     # pylint: disable=line-too-long
     Path("config.ert").write_text(
         """
-RUNPATH realization-%d/iter-%d
+RUNPATH realization-<IENS>/iter-<ITER>
 ECLBASE 2_R001_REEK-%d
 TIME_MAP time_map.txt
 QUEUE_SYSTEM LOCAL
@@ -574,7 +574,6 @@ def test_ert_setup_one_well_one_rft_point(tmpdir):
     # The purpose of the test is to demonstrate and run through the GEN_DATA
     # forward model without errors, but it will fail in the update step as this
     # test is not constructed for that:
-    assert "No active observations" in stdouterr
     assert "Simulations failed" in stdouterr
 
     # Asserts on GENDATA_RFT output:
@@ -643,7 +642,7 @@ def test_ert_setup_one_well_two_points_different_time_and_depth(tmpdir):
     Path("config.ert").write_text(
         dedent(
             """
-    RUNPATH realization-%d/iter-%d
+    RUNPATH realization-<IENS>/iter-<ITER>
     ECLBASE 2_R001_REEK-%d
     TIME_MAP time_map.txt
     QUEUE_SYSTEM LOCAL
@@ -688,7 +687,7 @@ def test_ert_setup_one_well_two_points_different_time_and_depth(tmpdir):
     # The purpose of the test is to demonstrate and run through the GEN_DATA
     # forward model without errors, but it will fail in the update step as this
     # test is not constructed for that:
-    assert "No active observations" in stdouterr
+    assert "OP_1_OBS1 is missing one or more responses" in stdouterr
     assert "Simulations failed" in stdouterr
 
     # Asserts on GENDATA_RFT output: