Fixed various CMS_MODULE.install, by not marked module installed if an error occurred!

Improved Auth related module implementation by having a way to change settings like token, max age.
  - use CMS_SETUP.site_id and related "auth.$module.token" ... configuration values.
  - removed related CMS_..._CONSTANTS classes.

For auth session module, use auth_session as table name, and use VARCHAR(64).
Extracted sql from blog module, and store it under site/scripts/install.sql .
Renamed a few $modulename.sql as install.sql

modules/openid/cms_openid_api.e

@@ -7,6 +7,7 @@ note
 
 class
 	CMS_OPENID_API
+
 inherit
 	CMS_MODULE_API
 
@@ -19,9 +20,25 @@ feature {NONE} -- Initialization
 
 	make_with_storage (a_api: CMS_API; a_openid_storage: CMS_OPENID_STORAGE_I)
 			-- Create an object with api `a_api' and storage `a_openid_storage'.
+		local
+			s: detachable READABLE_STRING_8
 		do
 			openid_storage := a_openid_storage
 			make (a_api)
+
+				-- Initialize openid related settings.
+			s := a_api.setup.string_8_item ("auth.openid.token")
+			if s = Void then
+				s := a_api.setup.site_id + default_session_token_suffix
+			end
+			create session_token.make_from_string (s)
+
+			s := a_api.setup.string_8_item ("auth.openid.max_age")
+			if s /= Void and then s.is_integer then
+				session_max_age := s.to_integer
+			else
+				session_max_age := 3600 --| one hour: *60(min) *60(sec)
+			end
 		ensure
 			openid_storage_set:  openid_storage = a_openid_storage
 		end
@@ -31,6 +48,16 @@ feature {CMS_MODULE} -- Access: User openid storage.
 	openid_storage: CMS_OPENID_STORAGE_I
 			-- storage interface.
 
+feature -- Access: token
+
+	default_session_token_suffix: STRING = "_OPENID_TOKEN_"
+
+	session_token: IMMUTABLE_STRING_8
+			-- Name of Cookie used to keep the session info.
+
+	session_max_age: INTEGER
+			-- Max age.		
+
 feature -- Access: User Openid
 
 	user_openid_by_userid_identity (a_uid: like {CMS_USER}.id; a_identity: READABLE_STRING_GENERAL): detachable CMS_USER