🔒️(users) restrict listable users to same organization

This is a quick fix to a security issue. Previously, any user could
list all users. Now /users/ endpoint only lists users from same
organization.

docker/auth/realm.json

@@ -50,6 +50,9 @@
       "firstName": "John",
       "lastName": "Doe",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -81,6 +84,9 @@
       "firstName": "E2E",
       "lastName": "Chromium",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -95,6 +101,9 @@
       "firstName": "E2E",
       "lastName": "Webkit",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -109,6 +118,9 @@
       "firstName": "E2E",
       "lastName": "Firefox",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -123,6 +135,9 @@
       "firstName": "E2E",
       "lastName": "Group Member",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -137,6 +152,9 @@
       "firstName": "E2E",
       "lastName": "Group Administrator",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -151,6 +169,9 @@
       "firstName": "E2E",
       "lastName": "Group Owner",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -165,6 +186,9 @@
       "firstName": "E2E",
       "lastName": "Mailbox Member",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -179,6 +203,9 @@
       "firstName": "E2E",
       "lastName": "Mailbox Administrator",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -193,6 +220,9 @@
       "firstName": "E2E",
       "lastName": "Mailbox Owner",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -207,6 +237,9 @@
       "firstName": "E2E",
       "lastName": "Group Member Mailbox Member",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -221,6 +254,9 @@
       "firstName": "E2E",
       "lastName": "Group Member Mailbox Administrator",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -235,6 +271,9 @@
       "firstName": "E2E",
       "lastName": "Group Member Mailbox Owner",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -249,6 +288,9 @@
       "firstName": "E2E",
       "lastName": "Group Administrator Mailbox Member",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -263,6 +305,9 @@
       "firstName": "E2E",
       "lastName": "Group Administrator Mailbox Administrator",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -277,6 +322,9 @@
       "firstName": "E2E",
       "lastName": "Group Administrator Mailbox Owner",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -291,6 +339,9 @@
       "firstName": "E2E",
       "lastName": "Group Owner Mailbox Member",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -305,6 +356,9 @@
       "firstName": "E2E",
       "lastName": "Group Owner Mailbox Administrator",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",
@@ -319,6 +373,9 @@
       "firstName": "E2E",
       "lastName": "Mailbox Owner",
       "enabled": true,
+      "attributes": {
+          "siret": "13002526500013"
+      },
       "credentials": [
         {
           "type": "password",