CreateChangeUsingHAGerrit1: Set test access modifier

Based on not being reused yet by other aggregating scenarios; private.

Change-Id: I2b201825783b470b4600a3c6424c23927f0eea02

src/test/scala/com/ericsson/gerrit/plugins/highavailability/scenarios/CreateChangeUsingHAGerrit1.scala

diff --git a/src/test/scala/com/ericsson/gerrit/plugins/highavailability/scenarios/CreateChangeUsingHAGerrit1.scala b/src/test/scala/com/ericsson/gerrit/plugins/highavailability/scenarios/CreateChangeUsingHAGerrit1.scala
index d43c81a..f07aabd 100644
--- a/src/test/scala/com/ericsson/gerrit/plugins/highavailability/scenarios/CreateChangeUsingHAGerrit1.scala
+++ b/src/test/scala/com/ericsson/gerrit/plugins/highavailability/scenarios/CreateChangeUsingHAGerrit1.scala
@@ -33,7 +33,7 @@
     replaceProperty("http_port1", 8081, in)
   }
 
-  val test: ScenarioBuilder = scenario(unique)
+  private val test: ScenarioBuilder = scenario(unique)
     .feed(data)
     .exec(httpRequest
       .body(ElFileBody(body)).asJson