travis-ci: bypass Composer ssl on PHP 5.3.3
travis-ci: bypass Composer ssl on PHP 5.3.3

The PHP 5.3.3 builds provided by Travis-CI do not include SSL support.
This in turn causes modern versions of Composer to fail with default
configuration. When testing under PHP 5.3.3, configure Composer to use
non-tls connections.

Copied from the cdb repository.

Change-Id: Ia647863a168aa9e7eed6a99906386d134cc80a1f

wikimedia/RelPath,wikimedia/RelPath