Fix url in pipeline

Change-Id: If1e2350506907ade1f6065968bc3c75ea9dca859
diff --git a/build-debian-packages-telegraf.groovy b/build-debian-packages-telegraf.groovy
index 5434ff3..89c29a4 100644
--- a/build-debian-packages-telegraf.groovy
+++ b/build-debian-packages-telegraf.groovy
@@ -17,7 +17,7 @@
         stage("checkout") {
             git.checkoutGitRepository(
                 "${workingDir}/telegraf",
-                "${SOURCE_URL}/telegraf",
+                "${SOURCE_URL}",
                 SOURCE_BRANCH,
                 SOURCE_CREDENTIALS,
                 true,