tfa-next: trigger on RUN_CI Gerrit message

Sometimes a manual trigger is required e.g. CI infra was unstable/failed
or failed to trigger on a new patchset.

Manual CI runs via Jenkins do not leave Verified+1 or SUCCESS/FAILURE messages. Patches need to be triggered by the Gerrit trigger plugin for the messages and votes to work.

Add a new regex trigger to start CI when the exact comment "RUN_CI" is
left.

In addition the gerrit-build.*code-review-value lines are not used or
required. The Gerrit plugin should not be setting or touching these
values.

Change-Id: I9a62d983a83a0a1c4e56d6065d2c25ccca3232db
Signed-off-by: Zachary Leaf <zachary.leaf@arm.com>
diff --git a/tf-a-main-tfa-next.yaml b/tf-a-main-tfa-next.yaml
index 4d0f4c1..9b4755e 100644
--- a/tf-a-main-tfa-next.yaml
+++ b/tf-a-main-tfa-next.yaml
@@ -29,17 +29,14 @@
                 exclude-no-code-change: true
                 exclude-private: true
                 exclude-wip: true
+            - comment-added-contains-event:
+                comment-contains-value: '^RUN_CI$'
         override-votes: true
         gerrit-build-started-verified-value: 0
         gerrit-build-successful-verified-value: 1
         gerrit-build-failed-verified-value: -1
         gerrit-build-unstable-verified-value: -1
         gerrit-build-notbuilt-verified-value: 0
-        gerrit-build-started-codereview-value: 0
-        gerrit-build-successful-codereview-value: 0
-        gerrit-build-failed-codereview-value: 0
-        gerrit-build-unstable-codereview-value: 0
-        gerrit-build-notbuilt-codereview-value: 0
         silent: false
         silent-start: false
     parameters: