Add missing 'type', 'defaultText' and 'literalExample' in module definitions

- add missing types in module definitions
- add missing 'defaultText' in module definitions
- wrap example with 'literalExample' where necessary in module definitions

nixos/modules/services/web-servers/tomcat.nix

@@ -24,6 +24,7 @@ in
       package = mkOption {
         type = types.package;
         default = pkgs.tomcat7;
+        defaultText = "pkgs.tomcat7";
         example = lib.literalExample "pkgs.tomcat8";
         description = ''
           Which tomcat package to use.
@@ -72,7 +73,9 @@ in
       };
 
       webapps = mkOption {
+        type = types.listOf types.package;
         default = [ tomcat ];
+        defaultText = "[ tomcat ]";
         description = "List containing WAR files or directories with WAR files which are web applications to be deployed on Tomcat";
       };
 
@@ -87,7 +90,9 @@ in
       };
 
       jdk = mkOption {
+        type = types.package;
         default = pkgs.jdk;
+        defaultText = "pkgs.jdk";
         description = "Which JDK to use.";
       };