Create default disabled sudo bind user

Read access is denied to the sudo container for unauthenticated users.
This shared user can be used to provide authenticated access to the
sudo information.

https://fedorahosted.org/freeipa/ticket/998

ipaserver/install/dsinstance.py

@@ -249,6 +249,7 @@ class DsInstance(service.Service):
         self.step("adding replication acis", self.__add_replication_acis)
         self.step("configuring user private groups", self.__user_private_groups)
         self.step("configuring netgroups from hostgroups", self.__host_nis_groups)
+        self.step("creating default SUDO bind user", self.__add_sudo_binduser)
         if hbac_allow:
             self.step("creating default HBAC rule allow_all", self.add_hbac)
 
@@ -311,6 +312,7 @@ class DsInstance(service.Service):
         server_root = find_server_root()
         self.sub_dict = dict(FQHN=self.fqdn, SERVERID=self.serverid,
                              PASSWORD=self.dm_password,
+                             RANDOM_PASSWORD=self.generate_random(),
                              SUFFIX=self.suffix.lower(),
                              REALM=self.realm_name, USER=DS_USER,
                              SERVER_ROOT=server_root, DOMAIN=self.domain,
@@ -475,6 +477,9 @@ class DsInstance(service.Service):
     def __add_enrollment_module(self):
         self._ldap_mod("enrollment-conf.ldif", self.sub_dict)
 
+    def generate_random(self):
+        return ipautil.ipa_generate_password()
+
     def __enable_ssl(self):
         dirname = config_dirname(self.serverid)
         dsdb = certs.CertDB(self.realm_name, nssdir=dirname, subject_base=self.subject_base)
@@ -735,6 +740,9 @@ class DsInstance(service.Service):
     def __root_autobind(self):
         self._ldap_mod("root-autobind.ldif")
 
+    def __add_sudo_binduser(self):
+        self._ldap_mod("sudobind.ldif", self.sub_dict)
+
     def replica_populate(self):
         self.ldap_connect()