Avoid requirement for PEAR custom repository

[oliverGrist]

Use the HTTP Request that has been migrated inside packagist.org

This avoids the need to include the PEAR repo:

vmware-vcloud-sdk-php-patched/composer.json

Lines 26 to 31 in ea6446c

	"repositories": [
	{
	"type": "pear",
	"url": "http://pear.php.net"
	}
	],

and the code changes from:

vmware-vcloud-sdk-php-patched/composer.json

Line 36 in ea6446c

"pear-pear/HTTP_Request2": "2.1.*",

to

    "pear/http_request2": "*"

Happy to make a PR if people agree?

---

Doing this seems to work thought a warning does display:

  - Installing vmware/vcloud-sdk-patched (v550.5.0): Downloading (100%)
  - Installing pear/pear_exception (v1.0.0): Downloading (100%)
  - Installing pear/net_url2 (v2.2.2): Downloading (100%)
  - Installing pear/http_request2 (v2.3.0): Downloading (100%)
vmware/vcloud-sdk-patched suggests installing pear-pear/HTTP_Request2 (Requires HTTP_Request2 from pear's repository http://pear.php.net if it is not installed system-wise)