Address unload order issues for res_stasis* modules

I've noticed when doing a graceful shutdown that the res_stasis_http.so
module gets unloaded before the modules that use it, which causes some
asserts during their unload.

While r386928 was a quick hack to get it to not assert and die, this
patch increases the use counts on res_stasis.so and res_stasis_http.so
properly. It's a bigger change than I expected, hence the review instead
of just committing it.

Review: https://reviewboard.asterisk.org/r/2489/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@388350 65c4cc65-6c06-0410-ace0-fbb531ad65f3

rest-api-templates/res_stasis_http_resource.c.mustache

@@ -38,6 +38,7 @@
 
 /*** MODULEINFO
 	<depend type="module">res_stasis_http</depend>
+	<depend type="module">res_stasis</depend>
 	<support_level>core</support_level>
  ***/
 
@@ -46,6 +47,7 @@
 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 
 #include "asterisk/module.h"
+#include "asterisk/stasis_app.h"
 #include "stasis_http/resource_{{name}}.h"
 {{#has_events}}
 #include "asterisk/stasis_channels.h"
@@ -184,12 +186,14 @@ static void stasis_http_{{c_nickname}}_cb(
 {{/has_events}}
 static int load_module(void)
 {
+	stasis_app_ref();
 	return stasis_http_add_handler(&{{root_full_name}});
 }
 
 static int unload_module(void)
 {
 	stasis_http_remove_handler(&{{root_full_name}});
+	stasis_app_unref();
 	return 0;
 }
 
@@ -197,6 +201,6 @@ AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT,
 	"RESTful API module - {{{description}}}",
 	.load = load_module,
 	.unload = unload_module,
-	.nonoptreq = "res_stasis_http",
+	.nonoptreq = "res_stasis_http,res_stasis",
 	);
 {{/api_declaration}}