Disable sudo in Travis to use the new enviroment

[Bakual]

According to http://docs.travis-ci.com/user/migrating-from-legacy/?utm_source=legacy-notice&utm_medium=banner&utm_campaign=legacy-upgrade we can migrate to the new Travis infrastructure by just adding sudo: false to our .travis.yml file.

This PR does this and it indeed run a bit faster.

[Bakual]

Last Travis runs were around 6-8 minutes. With this change it's around 4-6 minutes. So it's a bit faster 😄

[mbabker]

I did it on the 3.5-dev branch not wanting to touch staging with it yet. But if we're good with this change being applied to everything going forward, then merge it.

[Bakual]

Oh, didn't even notice this. 👍
Will adjust then to use the same code as you did in 3.5.
I think it should be fine as long as Travis passes.

[dgrammatiko]

APCu is not available by default for PHP 5.5 and 5.6. I guess this is needed:

# +5.5 uses APCU
  - if [ "`phpenv version-name`" != "5.4" ] && [ "`phpenv version-name`" != "5.3" ] && [ "`phpenv version-name`" != "hhvm" ]; then printf "\n"| pecl install apcu-beta && echo -e "extension = apcu.so\napc.enabled=1\napc.enable_cli=1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi

[mbabker]

It used to be there and at some point in Travis' updates it went away.
shrug

It's just something to deal with updating at some point.

On Saturday, July 18, 2015, Dimitris Grammatiko notifications@github.com
wrote:

APCu is not available by default for PHP 5.5 and 5.6. I guess this is
needed:

+5.5 uses APCU

• if [ "phpenv version-name" != "5.4" ] && [ "phpenv version-name" != "5.3" ] && [ "phpenv version-name" != "hhvm" ]; then printf "\n"| pecl install apcu-beta && echo -e "extension = apcu.so\napc.enabled=1\napc.enable_cli=1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi

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