Revert "Update integration test webhook to GerritForge channel"

The use of an existing Slack channel for integration tests
is flagged by Slack as a security threat and isn't allowed.

The integration test remains but would need to be run manually
once a dedicated temporary channel can accept the calls and then
be removed.

This reverts commit 534fa02df3e67f64bb5e6d142be1a84bbac4a8b4.

Change-Id: I3e562af31b0637c3cf4f7fec6464b56ed133f3d0
diff --git a/src/test/java/com/cisco/gerrit/plugins/slack/client/WebhookClientIntegrationTest.java b/src/test/java/com/cisco/gerrit/plugins/slack/client/WebhookClientIntegrationTest.java
index 2d566fc..67c8097 100644
--- a/src/test/java/com/cisco/gerrit/plugins/slack/client/WebhookClientIntegrationTest.java
+++ b/src/test/java/com/cisco/gerrit/plugins/slack/client/WebhookClientIntegrationTest.java
@@ -18,6 +18,7 @@
 package com.cisco.gerrit.plugins.slack.client;
 
 import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeNotNull;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.when;
 
@@ -60,14 +61,17 @@
 
   @Test
   public void canPublishMessage() throws Exception {
-    WebhookClient client;
-    client = new WebhookClient(getConfig());
-
     Properties properties = new Properties();
     try (InputStream testProperties = ResourceHelper.loadNamedResourceAsStream("test.properties")) {
       properties.load(testProperties);
     }
 
+    String webhookUrl = properties.getProperty("webhook-url");
+    assumeNotNull(webhookUrl);
+
+    WebhookClient client;
+    client = new WebhookClient(getConfig());
+
     MessageTemplate template;
     template = new MessageTemplate();
 
@@ -80,9 +84,6 @@
     template.setNumber(1234);
     template.setTitle("Adds a test commit message");
 
-    String webhookUrl;
-    webhookUrl = properties.getProperty("webhook-url");
-
     assertTrue(client.publish(template.render(), webhookUrl));
   }
 
@@ -96,6 +97,9 @@
       properties.load(testProperties);
     }
 
+    String webhookUrl = properties.getProperty("webhook-url");
+    assumeNotNull(webhookUrl);
+
     MessageTemplate template;
     template = new MessageTemplate();
 
@@ -114,9 +118,6 @@
             + "but this will be on multiple lines in IRC.\n\n\n\n\n"
             + "This is hidden.");
 
-    String webhookUrl;
-    webhookUrl = properties.getProperty("webhook-url");
-
     assertTrue(client.publish(template.render(), webhookUrl));
   }
 }
diff --git a/src/test/resources/test.properties b/src/test/resources/test.properties
index e2f5f5a..92ca845 100644
--- a/src/test/resources/test.properties
+++ b/src/test/resources/test.properties
@@ -15,4 +15,3 @@
 #
 #
 
-webhook-url=https://hooks.slack.com/services/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