Stop support the Ubuntu 14.04

[chusiang]

The Ubuntu PPA has stop support the Ubuntu 14.04 on 14 hours ago (Sat May 4 08:54:30 CST 2019), so I will stop support it first.

https://launchpad.net/%7Eondrej/+archive/ubuntu/php/+index?batch=75&memo=150&start=150

php7.0 | 7.0.33-7+ubuntu19.04.1+deb.sury.org+1 | Ondřej Surý                                      (14 hours ago)
php7.0 | 7.0.33-7+ubuntu18.10.1+deb.sury.org+1 | Ondřej Surý                                      (14 hours ago)
php7.0 | 7.0.33-7+ubuntu18.04.1+deb.sury.org+1 | Ondřej Surý                                      (14 hours ago)
php7.0 | 7.0.33-7+ubuntu16.04.1+deb.sury.org+1 | Ondřej Surý                                      (14 hours ago)

The build failed on CI.

Travis CI APP [8:41 AM]
Build #177 (4962656) of chusiang/php7.ansible.role@develop by Chu-Siang Lai failed in 19 min 52 sec

• https://travis-ci.org/chusiang/php7.ansible.role/jobs/527856480

[chusiang]

The CI jobs were all passed, and improved to Galaxy, so I close this issue.