Try to return context: back to plan

component is used in tests/bind tests to choose correct requirements for
otherwise shared tests. Try to put context propagated from original
package to those tests.

Do not use public repo import, but (re)define it manually to keep
context propagated.

plans.fmf

@@ -1,3 +1,6 @@
+environment+:
+  PACKAGE: bind9.18
+
 /tier1-internal:
   plan:
     import:
@@ -5,10 +8,20 @@
       name: /plans/tier1/internal
 
 /tier1-public:
-  plan:
-    import:
-      url: https://src.fedoraproject.org/tests/bind.git
-      name: /plans/tier1/public
+  # import does not propagate context changes!
+  #plan:
+  #  import:
+  #    url: https://src.fedoraproject.org/tests/bind.git
+  #    name: /plans/tier1/public
+  summary: Public (Fedora) Tier1 beakerlib tests
+  discover:
+    how: fmf
+    url: https://src.fedoraproject.org/tests/bind.git
+    filter: 'tier: 1'
+  execute:
+    how: tmt
+  context:
+    component: bind9.18
 
 /tier2-tier3-internal:
   plan:
@@ -17,10 +30,20 @@
       name: /plans/tier2-tier3/internal
 
 /tier2-tier3-public:
-  plan:
-    import:
-      url: https://src.fedoraproject.org/tests/bind.git
-      name: /plans/tier2-tier3/public
+  #plan:
+  #  import:
+  #    url: https://src.fedoraproject.org/tests/bind.git
+  #    name: /plans/tier2-tier3/public
+  # context propagation does not work that way!
+  summary: Public (Fedora) Tier2+3 beakerlib tests
+  discover:
+    how: fmf
+    url: https://src.fedoraproject.org/tests/bind.git
+    filter: 'tier: 2 | tier: 3'
+  execute:
+    how: tmt
+  context:
+    component: bind9.18
 
 /others-internal:
   plan: