e2e-tests: Fix regex to adapt to JSON_COMPACT

Since stable-3.1 commit [1] JSON responses output COMPACT_JSON
unconditionally.

[1] commit 8ae8584c30dd2a0be4d01e0c741afc32f443f62b

Change-Id: Ia03546512d5bfe39684ac893e19cfa161a090a78
diff --git a/e2e-tests/src/test/scala/com/google/gerrit/scenarios/CheckProjectsCacheFlushEntries.scala b/e2e-tests/src/test/scala/com/google/gerrit/scenarios/CheckProjectsCacheFlushEntries.scala
index 96943ce..900702a 100644
--- a/e2e-tests/src/test/scala/com/google/gerrit/scenarios/CheckProjectsCacheFlushEntries.scala
+++ b/e2e-tests/src/test/scala/com/google/gerrit/scenarios/CheckProjectsCacheFlushEntries.scala
@@ -37,7 +37,7 @@
         }
       })
       .exec(http(uniqueName).get("${url}")
-          .check(regex("\"" + memKey + "\": (\\d+)")
+          .check(regex("\"" + memKey + "\":(\\d+)")
               .is(session => session(entriesKey).as[String])))
 
   setUp(
diff --git a/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GetMasterBranchRevision.scala b/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GetMasterBranchRevision.scala
index 1137ad5..f2236d1 100644
--- a/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GetMasterBranchRevision.scala
+++ b/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GetMasterBranchRevision.scala
@@ -23,7 +23,7 @@
   private val data: FeederBuilder = jsonFile(resource).convert(keys).queue
   var revision: Option[String] = None
   val revisionKey = "revision"
-  val revisionPattern: String = "\"" + revisionKey + "\": \"(.+)\""
+  val revisionPattern: String = "\"" + revisionKey + "\":\"(.+)\""
 
   val test: ScenarioBuilder = scenario(uniqueName)
       .feed(data)
diff --git a/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GetProjectsCacheEntries.scala b/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GetProjectsCacheEntries.scala
index 266c0b9..0bb3afb 100644
--- a/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GetProjectsCacheEntries.scala
+++ b/e2e-tests/src/test/scala/com/google/gerrit/scenarios/GetProjectsCacheEntries.scala
@@ -30,7 +30,7 @@
   val test: ScenarioBuilder = scenario(uniqueName)
       .feed(data)
       .exec(http(uniqueName).get("${url}")
-          .check(regex("\"" + memKey + "\": (\\d+)").saveAs(entriesKey)))
+          .check(regex("\"" + memKey + "\":(\\d+)").saveAs(entriesKey)))
       .exec(session => {
         if (consumer.nonEmpty) {
           consumer.get.entriesBeforeFlush(session(entriesKey).as[Int])