Moving HttpTester to "tests" scoped jetty-http artifact.

+ HttpTester, a testing class, was used by jetty-servlets,
   embedded-jetty-examples, and test-integration, all from
   those testing scopes.  Moved the HttpTester into the
   pre-existing jetty-http "tests" classified artifact.

examples/embedded/pom.xml

@@ -95,5 +95,12 @@
       <artifactId>jetty-test-helper</artifactId>
       <!-- scope>test</scope-->
     </dependency>
+    <dependency>
+      <groupId>org.eclipse.jetty</groupId>
+      <artifactId>jetty-http</artifactId>
+      <version>${project.version}</version>
+      <classifier>tests</classifier>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 </project>

jetty-servlets/pom.xml

@@ -108,6 +108,13 @@
       <version>${project.version}</version>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.eclipse.jetty</groupId>
+      <artifactId>jetty-http</artifactId>
+      <version>${project.version}</version>
+      <classifier>tests</classifier>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.eclipse.jetty.toolchain</groupId>
       <artifactId>jetty-test-helper</artifactId>

tests/test-integration/pom.xml

@@ -116,6 +116,13 @@
       <version>${project.version}</version> 
       <type>pom</type>
     </dependency>
+    <dependency>
+      <groupId>org.eclipse.jetty</groupId>
+      <artifactId>jetty-http</artifactId>
+      <version>${project.version}</version>
+      <classifier>tests</classifier>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>org.eclipse.jetty.toolchain</groupId>
       <artifactId>jetty-test-helper</artifactId>