Migrating to our ldap fork (#12149)

go.mod

@@ -16,7 +16,7 @@ require (
 	github.com/fortytw2/leaktest v1.3.0 // indirect
 	github.com/fsnotify/fsnotify v1.4.7
 	github.com/go-gorp/gorp v2.0.0+incompatible // indirect
-	github.com/go-ldap/ldap v3.0.3+incompatible
+	github.com/go-ldap/ldap v3.0.3+incompatible // indirect
 	github.com/go-redis/redis v6.15.2+incompatible
 	github.com/go-sql-driver/mysql v1.4.1
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
@@ -45,6 +45,7 @@ require (
 	github.com/mailru/easyjson v0.0.0-20190626092158-b2ccc519800e // indirect
 	github.com/mattermost/go-i18n v1.11.0
 	github.com/mattermost/gorp v2.0.1-0.20190301154413-3b31e9a39d05+incompatible
+	github.com/mattermost/ldap v3.0.4+incompatible
 	github.com/mattermost/rsc v0.0.0-20160330161541-bbaefb05eaa0
 	github.com/mattermost/viper v1.0.4
 	github.com/mattn/go-runewidth v0.0.4 // indirect