Use EPP instead of ERB

As a Preparation for making this Module "Sensitive"-aware, we prefer
to use EPP instead of ERB in such Situations, where "Sensitive" could
come into Play, as EPP is able to handle Data of Type Sensitive
natively.

manifests/cli.pp

@@ -60,7 +60,16 @@
     owner   => 'root',
     group   => 'root',
     mode    => '0644',
-    content => template('foreman/hammer_etc.yml.erb'),
+    content => epp(
+      'foreman/hammer_etc.yml.epp',
+      {
+        host            => $foreman_url_real,
+        use_sessions    => $use_sessions,
+        refresh_cache   => $refresh_cache,
+        request_timeout => $request_timeout,
+        ssl_ca_file     => $ssl_ca_file_real,
+      }
+    ),
   }
 
   # Separate configuration for admin username/password
@@ -83,7 +92,13 @@
       group   => 'root',
       mode    => '0600',
       replace => false,
-      content => template('foreman/hammer_root.yml.erb'),
+      content => epp(
+        'foreman/hammer_root.yml.epp',
+        {
+          username => $username_real,
+          password => $password_real,
+        }
+      ),
     }
   }
 

templates/hammer_etc.yml.epp

@@ -0,0 +1,30 @@
+<%- |
+  Optional[Stdlib::HTTPUrl]      $host,
+  Boolean                        $use_sessions,
+  Boolean                        $refresh_cache,
+  Integer[-1]                    $request_timeout,
+  Optional[Stdlib::Absolutepath] $ssl_ca_file,
+| -%>
+:foreman:
+  # Enable/disable foreman commands
+  :enable_module: true
+
+  # Your foreman server address
+  :host: '<%= $host %>'
+
+  # Enable using sessions
+  # When sessions are enabled, hammer ignores credentials stored in the config file
+  # and asks for them interactively at the begining of each session.
+  :use_sessions: <%= $use_sessions %>
+
+  # Check API documentation cache status on each request
+  :refresh_cache: <%= $refresh_cache %>
+
+  # API request timeout in seconds, set -1 for infinity
+  :request_timeout: <%= $request_timeout %>
+
+<% if $ssl_ca_file { -%>
+
+:ssl:
+  :ssl_ca_file: '<%= $ssl_ca_file %>'
+<% } -%>

templates/hammer_root.yml.epp

@@ -0,0 +1,8 @@
+<%- |
+  Optional[String] $username,
+  Optional[String] $password,
+| -%>
+:foreman:
+  # Credentials. You'll be asked for the interactively if you leave them blank here
+  :username: '<%= $username %>'
+  :password: '<%= $password %>'