Rename gatling test pipeline using kebab-case

All jobs use kebab-case style naming: align the
Gatling tests also to the others.

Change-Id: Ifd88fa3984a4aa0a08e05078a492db4844e2a10d
diff --git a/jenkins/gatlingTestPipeline.groovy b/jenkins/gatling-test-pipeline.groovy
similarity index 100%
rename from jenkins/gatlingTestPipeline.groovy
rename to jenkins/gatling-test-pipeline.groovy
diff --git a/jenkins/gatlingTestPipeline.yaml b/jenkins/gatling-test-pipeline.yaml
similarity index 84%
rename from jenkins/gatlingTestPipeline.yaml
rename to jenkins/gatling-test-pipeline.yaml
index 21fd1de..861ac31 100644
--- a/jenkins/gatlingTestPipeline.yaml
+++ b/jenkins/gatling-test-pipeline.yaml
@@ -7,6 +7,6 @@
           url: https://gerrit.googlesource.com/a/aws-gerrit
           branches:
             - master
-    dsl: !include-raw: gatlingTestPipeline.groovy
+    dsl: !include-raw: gatling-test-pipeline.groovy
     triggers:
       - timed: "@midnight"