(MODULES-10899) Install PHP 7 by default on SLES >= 15

On SLES >= 15 it appears as though the `apache2-mod_php5` package
is no longer available in the default repo.

This commit ensures that the default value for the $php_version
parameter is 7 on SLES >= 15 and the appropriate `apache2-mod_php7`
package is used.

Author: Ciaran McCrisken

manifests/params.pp

@@ -698,26 +698,27 @@
     $logroot_mode        = undef
     $lib_path            = '/usr/lib64/apache2' #changes for some modules based on mpm
     $mpm_module          = 'prefork'
-
     if versioncmp($::operatingsystemrelease, '15') < 0 {
       $default_ssl_cert    = '/etc/apache2/ssl.crt/server.crt'
       $default_ssl_key     = '/etc/apache2/ssl.key/server.key'
+      $php_version         = '5'
     } else {
       $default_ssl_cert    = '/etc/apache2/ssl.crt/default-server.crt'
       $default_ssl_key     = '/etc/apache2/ssl.key/default-server.key'
+      $php_version         = '7'
     }
+    $suphp_configpath    = "/etc/php${php_version}/apache2"
     $ssl_sessioncache    = '/var/lib/apache2/ssl_scache(512000)'
     $suphp_addhandler    = 'x-httpd-php'
     $suphp_engine        = 'off'
-    $suphp_configpath    = '/etc/php5/apache2'
-    $php_version         = '5'
     if versioncmp($::operatingsystemrelease, '11') < 0 or versioncmp($::operatingsystemrelease, '12') >= 0 {
-      $mod_packages      = {
+      $mod_packages = {
         'auth_kerb'   => 'apache2-mod_auth_kerb',
         'auth_gssapi' => 'apache2-mod_auth_gssapi',
         'dav_svn'     => 'subversion-server',
         'perl'        => 'apache2-mod_perl',
         'php5'        => 'apache2-mod_php5',
+        'php7'        => 'apache2-mod_php7',
         'python'      => 'apache2-mod_python',
         'security'    => 'apache2-mod_security2',
         'worker'      => 'apache2-worker',

spec/acceptance/mod_php_spec.rb

@@ -45,6 +45,10 @@ class { 'apache::mod::php': }
       describe file("#{apache_hash['mod_dir']}/php7.conf") do
         it { is_expected.to contain 'DirectoryIndex index.php' }
       end
+    elsif os[:family] == 'sles' && os[:release].to_i >= 15
+      describe file("#{apache_hash['mod_dir']}/php7.conf") do
+        it { is_expected.to contain 'DirectoryIndex index.php' }
+      end
     else
       describe file("#{apache_hash['mod_dir']}/php5.conf") do
         it { is_expected.to contain 'DirectoryIndex index.php' }