Set PHP Latest defaults 5.6.31, 7.0.21, 7.1.7
Set PHP Latest defaults 5.6.31, 7.0.21, 7.1.7

[#148386783 #148292817 #148307943]

cf-identity/php-buildpack,cf-identity/php-buildpack,cf-identity/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,Orange-OpenSource/cf-php-build-pack,cf-identity/php-buildpack,cf-identity/php-buildpack,cloudfoundry/php-buildpack,Orange-OpenSource/cf-php-build-pack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack,Orange-OpenSource/cf-php-build-pack,cloudfoundry/php-buildpack,cloudfoundry/php-buildpack