Move TempFileUtil to testutil package

Move the TempFileUtil helper class to testutil package in gerrit-server
as it is valuable not only in acceptance tests.

Change-Id: Ied3706b5eafbcfc1c749607ab83312f39b2284e4

gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/AbstractDaemonTest.java

@@ -38,6 +38,7 @@ import com.google.gerrit.server.git.ProjectConfig;
 import com.google.gerrit.server.project.ProjectCache;
 import com.google.gerrit.server.project.Util;
 import com.google.gerrit.testutil.ConfigSuite;
+import com.google.gerrit.testutil.TempFileUtil;
 import com.google.gson.Gson;
 import com.google.gwtorm.server.SchemaFactory;
 import com.google.inject.Inject;

gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/GerritServer.java

@@ -22,6 +22,7 @@ import com.google.gerrit.server.config.FactoryModule;
 import com.google.gerrit.server.config.GerritServerConfig;
 import com.google.gerrit.server.index.ChangeSchemas;
 import com.google.gerrit.server.util.SocketUtil;
+import com.google.gerrit.testutil.TempFileUtil;
 import com.google.inject.Injector;
 import com.google.inject.Key;
 import com.google.inject.Module;

gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/GitUtil.java

@@ -16,6 +16,7 @@ package com.google.gerrit.acceptance;
 
 import com.google.common.collect.Iterables;
 import com.google.gerrit.reviewdb.client.Project;
+import com.google.gerrit.testutil.TempFileUtil;
 
 import com.jcraft.jsch.JSch;
 import com.jcraft.jsch.JSchException;

gerrit-acceptance-tests/src/test/java/com/google/gerrit/acceptance/pgm/ReindexIT.java

@@ -16,8 +16,8 @@ package com.google.gerrit.acceptance.pgm;
 
 import static org.junit.Assert.assertEquals;
 
-import com.google.gerrit.acceptance.TempFileUtil;
 import com.google.gerrit.launcher.GerritLauncher;
+import com.google.gerrit.testutil.TempFileUtil;
 
 import org.junit.After;
 import org.junit.Before;

gerrit-server/src/test/java/com/google/gerrit/testutil/TempFileUtil.java

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package com.google.gerrit.acceptance;
+package com.google.gerrit.testutil;
 
 import java.io.File;
 import java.io.IOException;