tutorial: Update gerrit configuration to gerrit 3.7

docker.io/gerritcodereview/gerrit:latest has been updated to gerrit 3.7
it introduces breaking changes [1][2] that require to update how the
configuration is modified during tutorial run.

ERROR: ... Parameter 'label.Code-Review.copyMinScore'
is deprecated and cannot be set,
use 'is:MIN' in 'label.Code-Review.copyCondition' instead.

ERROR: ... Parameter 'label.Code-Review.copyAllScoresOnTrivialRebase'
is deprecated and cannot be set,
use 'changekind:TRIVIAL_REBASE' in 'label.Code-Review.copyCondition' instead.

ERROR: ... Value 'MaxWithBlock' of 'label.Verified.function'
is not allowed and cannot be set.
Label functions can only be set to {NO_BLOCK, NO_OP, PATCH_SET_LOCK}.
Use submit requirements instead of label functions.

[1] https://www.gerritcodereview.com/3.7.html#breaking-changes
[2] https://gerrit-review.googlesource.com/c/gerrit/+/334467

Change-Id: I2f27d0e99470c3baee82abc126cac72132a2da48

doc/source/examples/playbooks/project.config

@@ -61,23 +61,21 @@
 [label "Code-Review"]
 	function = MaxWithBlock
 	defaultValue = 0
-	copyMinScore = true
-	copyAllScoresOnTrivialRebase = true
 	value = -2 This shall not be merged
 	value = -1 I would prefer this is not merged as is
 	value =  0 No score
 	value = +1 Looks good to me, but someone else must approve
 	value = +2 Looks good to me, approved
+	copyCondition = changekind:NO_CHANGE OR changekind:TRIVIAL_REBASE OR is:MIN
 [label "Verified"]
-	function = MaxWithBlock
 	value = -2 Fails
 	value = -1 Does not seem to work
 	value =  0 No score
 	value = +1 Works for me
 	value = +2 Verified
 	defaultValue = 0
+	copyCondition = changekind:NO_CHANGE OR changekind:TRIVIAL_REBASE
 [label "Workflow"]
-	function = MaxWithBlock
 	value = -1 Work in progress
 	value =  0 Ready for reviews
 	value = +1 Approved