Updating fmf adjust

Sanity/bz1422473-RFE-rebase-tcpdump-to-4-9-0/main.fmf

@@ -2,6 +2,8 @@ summary: Test for BZ#1422473 ([RFE] rebase tcpdump to 4.9.0)
 description: |
     Bug summary: [RFE] rebase tcpdump to 4.9.0
     Bugzilla link: https://bugzilla.redhat.com/show_bug.cgi?id=1422473
+    Test case has been migrated to git. Any changes made here might be overwritten.
+    See: https://tmt.readthedocs.io/en/latest/questions.html#nitrate-migration
 component:
 - tcpdump
 test: ./runtest.sh
@@ -17,8 +19,10 @@ tag:
 - Tier1
 - notier
 tier: '1'
-relevancy: |
-    distro < rhel-7: False
+adjust:
+-   enabled: false
+    when: distro ~< rhel-7
+    continue: false
 extra-nitrate: TC#0552746
 extra-summary: /CoreOS/tcpdump/Sanity/bz1422473-RFE-rebase-tcpdump-to-4-9-0
 extra-task: /CoreOS/tcpdump/Sanity/bz1422473-RFE-rebase-tcpdump-to-4-9-0