Rename default packages for php client (#315)

* Rename default packages for php client

* Generate php client (OAS3)

* Rename namespace for tests

* Delete unnecessary 'use'

* Rename method/variable

* Update php client (OAS3)

* Generate php client (OAS2)

* Rename namespace for tests

* Delete unused files

* Fix tests

samples/client/petstore/php/OpenAPIToolsClient-php/tests/FakeHttpClient.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace OpenAPITools\Client;
+
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Exception\GuzzleException;
+use GuzzleHttp\Psr7\Response;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
+class FakeHttpClient implements ClientInterface
+{
+    /** @var  RequestInterface|null */
+    private $request;
+    /** @var  ResponseInterface|null */
+    private $response;
+
+    /**
+     * @return null|RequestInterface
+     */
+    public function getLastRequest()
+    {
+        return $this->request;
+    }
+
+    /**
+     * @param null|ResponseInterface $response
+     */
+    public function setResponse(ResponseInterface $response = null)
+    {
+        $this->response = $response;
+    }
+
+    /**
+     * Send an HTTP request.
+     *
+     * @param RequestInterface $request Request to send
+     * @param array $options Request options to apply to the given
+     *                                  request and to the transfer.
+     *
+     * @return ResponseInterface
+     * @throws GuzzleException
+     */
+    public function send(RequestInterface $request, array $options = [])
+    {
+        $this->request = $request;
+        return $this->response ?: new Response(200);
+    }
+
+    public function sendAsync(RequestInterface $request, array $options = [])
+    {
+        throw new \RuntimeException('not implemented');
+    }
+
+    public function request($method, $uri, array $options = [])
+    {
+        throw new \RuntimeException('not implemented');
+    }
+
+    public function requestAsync($method, $uri, array $options = [])
+    {
+        throw new \RuntimeException('not implemented');
+    }
+
+    public function getConfig($option = null)
+    {
+        throw new \RuntimeException('not implemented');
+    }
+}