runTask: Correct TESTTORUN

vars/runTask.groovy

@@ -7,7 +7,7 @@ def call(String task, String branch, String repo, String phpversion, String data
         environment {
             PHP_VERSION = "${phpversion}"
             DBTYPE = "${database}"
-            TASK = "${task}"
+            TESTTORUN = "${task}"
             PATHTORUNNER = "${HOME}/scripts/runner"
         }