Update integration test webhook to GerritForge channel

Cisco has definitively closed the door to the integration Slack
channel used by the tests. GerritForge has created a new
channel that can be used for CI validation.

Use the new channel URL for testing purposes.

Change-Id: I2a619282c9920c2cb090dd2cf6313db18bf59149

src/test/resources/test.properties

diff --git a/src/test/resources/test.properties b/src/test/resources/test.properties
index 6cfb400..e2f5f5a 100644
--- a/src/test/resources/test.properties
+++ b/src/test/resources/test.properties
@@ -15,4 +15,4 @@
 #
 #
 
-webhook-url=https://hooks.slack.com/services/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
+webhook-url=https://hooks.slack.com/services/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