Description:
------------
To allow mocking with PHPUnit, PECL amqp needs to allow overriding the 
constructor without calling the parent constructor. Additionally, declare is a 
reserved word in PHP and therefore it is not possible to override that method in 
userland.

This is the missing part to make PECL amqp usable with PHPUnit.

Test script:
---------------
<?php
class AmqpTest extends PHPUnit_Framework_TestCase
{
    public function setUp()
    {
        $this->exchange = $this->getMockBuilder('AMQPExchange')
            ->disableOriginalConstructor()
            ->getMock();
        $this->queue = $this->getMockBuilder('AMQPQueue')
            ->disableOriginalConstructor()
            ->getMock();
        $this->channel = $this->getMockBuilder('AMQPChannel')
            ->disableOriginalConstructor()
            ->getMock();
    }

    public function testCallExchangeDeclare()
    {
        $this->assertNull($this->exchange->declare());
    }

    public function testCallQueueDeclare()
    {
        $this->assertNull($this->queue->declare());
    }
}

Expected result:
----------------
PHPUnit 3.6.11 by Sebastian Bergmann.

..

Time: 0 seconds, Memory: 6.00Mb

OK (2 tests, 2 assertions)

Actual result:
--------------
PHPUnit 3.6.11 by Sebastian Bergmann.

Segmentation fault