templates/iqe: add parameter to disable parallel runs

We don't have any parallel test cases yet.

deploy/iqe-trigger-integration.yml

@@ -53,6 +53,8 @@ objects:
             value: ${IQE_LOG_LEVEL}
           - name: IQE_REQUIREMENTS
             value: ${IQE_REQUIREMENTS}
+          - name: IQE_PARALLEL_ENABLED
+            value: ${IQE_PARALLEL_ENABLED}
           - name: IQE_REQUIREMENTS_PRIORITY
             value: ${IQE_REQUIREMENTS_PRIORITY}
           - name: IQE_TEST_IMPORTANCE
@@ -173,3 +175,5 @@ parameters:
   value: ''
 - name: VNC_GEOMETRY
   value: '1920x1080'
+- name: IQE_PARALLEL_ENABLED
+  value: "false"