leadership: Fix data races in tests.

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

leadership/candidate_test.go

@@ -27,7 +27,6 @@ func TestCandidate(t *testing.T) {
 	electedCh := candidate.ElectedCh()
 
 	// Should issue a false upon start, no matter what.
-	assert.False(t, candidate.IsLeader())
 	assert.False(t, <-electedCh)
 
 	// Since the lock always succeeeds, we should get elected.

leadership/follower_test.go

@@ -32,9 +32,9 @@ func TestFollower(t *testing.T) {
 
 	// We shouldn't see duplicate events.
 	assert.Equal(t, <-leaderCh, "leader1")
-	assert.Equal(t, follower.Leader(), "leader1")
 	assert.Equal(t, <-leaderCh, "leader2")
 	assert.Equal(t, <-leaderCh, "leader1")
+	assert.Equal(t, follower.Leader(), "leader1")
 
 	// Once stopped, iteration over the leader channel should stop.
 	follower.Stop()