Test plan touch ups

* shortened the test plan names to avoid overflowing the 63 char
      hard limit imposed by openshift during test running

    * defined the distro context in the modular plan itself as plans
      that were disabled were beign discovered, causing them to show up
      as failed without even running

gating.yaml

@@ -5,6 +5,6 @@ product_versions:
 decision_context: osci_compose_gate
 rules:
   - !PassingTestCaseRule {
-      test_case_name: osci.brew-build./plans/rhel-gating-modular.functional,
-      test_case_name: osci.brew-build./plans/rhel-gating-system.functional,
+      test_case_name: osci.brew-build./plans/modular.functional,
+      test_case_name: osci.brew-build./plans/system.functional,
     }

plans.fmf

@@ -1,12 +1,14 @@
-/rhel-gating-modular:
+/modular:
   plan:
     import:
       url: https://pkgs.devel.redhat.com/git/tests/unixODBC
       name: /plans/modular
       scope: all-plans
       importing: become-parent
+  context:
+    distro: rhel-9
 
-/rhel-gating-system:
+/system:
   plan:
     import:
       url: https://pkgs.devel.redhat.com/git/tests/unixODBC