Rename php5-fpm role to php-fpm

In Ubuntu 16.04 the package is now called just "php-fpm" and it
makes more sense to just have this role be called that.

roles/php-fpm/defaults/main.yml

@@ -0,0 +1,21 @@
+---
+# file: roles/php5-fpm/defaults/main.yml
+
+# default is on, but turn it off because of protection in nginx vhosts
+cgi_fix_pathinfo: 0
+
+# some sane defaults for PHP 5.5+ Opcache
+# see: https://php.net/manual/en/opcache.installation.php
+opcache_enable: 1
+opcache_enable_cli: 0
+opcache_memory_consumption: 96
+opcache_interned_strings_buffer: 8
+opcache_max_accelerated_files: 4000
+opcache_use_cwd: 1
+opcache_validate_timestamps: 1
+opcache_revalidate_freq: 60
+opcache_save_comments: 0
+opcache_load_comments: 0
+opcache_fast_shutdown: 1
+
+# vim: set ts=2 sw=2: