Use "Rollcall-Vote" for TC and infra-council

Adopt the idea that a review label name should be as
widely-applicable as possible for a given concept so that different
repos with similar needs will end up sharing columns in the user
interface.  Since the TC and infra-specs repos both need "votes from
the people who are members of the committee" as a review label
(while preserving the ability for non-members to leave their feedback
as +/- entries in code-review), have them share the name "Rollcall
Vote".  This will cause them both to appear in the "RV" column in
Gerrit change lists.  Simply "Vote" is an option worth considering,
but it is not clear how "Vote" is different from Code-Review.

Change-Id: Id53d1bea7f53b92009ba6e9274162b8ffa3b2b92

gerrit/acls/openstack-infra/infra-specs.config

@@ -1,7 +1,7 @@
 [access "refs/heads/*"]
 abandon = group infra-core
-label-Council-Vote = -2..+1 group infra-core
-label-Council-Vote = -1..+1 group infra-council
+label-Rollcall-Vote = -2..+1 group infra-core
+label-Rollcall-Vote = -1..+1 group infra-council
 label-Workflow = -1..+1 group infra-ptl
 
 [label "Code-Review"]
@@ -14,7 +14,7 @@ value = 0 No score
 value = +1 Looks good to me
 value = +2 Unused +2
 
-[label "Council-Vote"]
+[label "Rollcall-Vote"]
 defaultValue = 0
 function = AnyWithBlock
 value = -2 Veto

gerrit/acls/openstack/governance.config

@@ -1,7 +1,7 @@
 [access "refs/heads/*"]
 abandon = group tech-committee-chair
 exclusiveGroupPermissions = abandon label-Workflow
-label-TC-Vote = -1..+1 group tech-committee
+label-Rollcall-Vote = -1..+1 group tech-committee
 label-Workflow = -1..+1 group tech-committee-chair
 
 [access "refs/tags/*"]
@@ -17,7 +17,7 @@ value = 0 No score
 value = +1 Looks good to me
 value = +2 Unused +2
 
-[label "TC-Vote"]
+[label "Rollcall-Vote"]
 defaultValue = 0
 function = NoOp
 value = -1 No