Factor creation of test container out to a common method

Creating the container in a common place will ensure that all instances
are created with the same parameters in future.

Change-Id: I520d748cee474cf8af62a623082741d5d62c86c4
diff --git a/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/PostgresModuleTest.java b/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/PostgresModuleTest.java
index cb177c2..5df97d0 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/PostgresModuleTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/PostgresModuleTest.java
@@ -16,6 +16,7 @@
 
 import static com.ericsson.gerrit.plugins.gcconductor.postgresqueue.TestUtil.configMockFor;
 import static com.ericsson.gerrit.plugins.gcconductor.postgresqueue.TestUtil.invalidConfigMockFor;
+import static com.ericsson.gerrit.plugins.gcconductor.postgresqueue.TestUtil.newContainer;
 import static com.google.common.truth.Truth.assertThat;
 import static org.mockito.Mockito.doThrow;
 import static org.mockito.Mockito.mock;
@@ -40,7 +41,7 @@
 
   @BeforeClass
   public static void startPostgres() {
-    container = new PostgreSQLContainer<>();
+    container = newContainer();
     container.start();
   }
 
diff --git a/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/PostgresQueueTest.java b/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/PostgresQueueTest.java
index 2dc6271..b767d04 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/PostgresQueueTest.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/PostgresQueueTest.java
@@ -15,6 +15,7 @@
 package com.ericsson.gerrit.plugins.gcconductor.postgresqueue;
 
 import static com.ericsson.gerrit.plugins.gcconductor.postgresqueue.TestUtil.configMockFor;
+import static com.ericsson.gerrit.plugins.gcconductor.postgresqueue.TestUtil.newContainer;
 import static com.google.common.truth.Truth.assertThat;
 import static org.junit.Assert.fail;
 import static org.mockito.ArgumentMatchers.anyString;
@@ -46,7 +47,7 @@
 
   @BeforeClass
   public static void startPostgres() {
-    container = new PostgreSQLContainer<>();
+    container = newContainer();
     container.start();
   }
 
diff --git a/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/TestUtil.java b/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/TestUtil.java
index a90f0f4..bc6e39e 100644
--- a/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/TestUtil.java
+++ b/src/test/java/com/ericsson/gerrit/plugins/gcconductor/postgresqueue/TestUtil.java
@@ -24,6 +24,10 @@
 @Ignore
 public class TestUtil {
 
+  static PostgreSQLContainer<?> newContainer() {
+    return new PostgreSQLContainer<>();
+  }
+
   static EvaluatorConfig configMockFor(PostgreSQLContainer<?> container) {
     EvaluatorConfig configMock = mock(EvaluatorConfig.class);
     when(configMock.getDatabaseUrl()).thenReturn(urlWithoutDatabase(container));