modify role handling for AD

src/main/java/org/codelibs/fess/Constants.java

...delibs/fess/app/web/admin/general/AdminGeneralAction.java

...ava/org/codelibs/fess/app/web/admin/general/EditForm.java

src/main/java/org/codelibs/fess/ldap/LdapManager.java

src/main/java/org/codelibs/fess/ldap/LdapUser.java

...in/java/org/codelibs/fess/mylasta/direction/FessProp.java

src/main/resources/fess_label.properties

src/main/webapp/WEB-INF/view/admin/general/admin_general.jsp