Test: add Fedora iot-raw-image test manifests with customizations

Add Fedora iot-raw-image test manifests with supported customizations,
specifically:
 - custom users and groups
 - custom enabled services
 - custom files and directories

Signed-off-by: Tomáš Hozza <thozza@redhat.com>

tools/test-case-generators/format-request-map.json

@@ -537,6 +537,96 @@
     },
     "overrides": {}
   },
+  "iot-raw-image-customizations": {
+    "compose-request": {
+      "distro": "",
+      "arch": "",
+      "image-type": "iot-raw-image",
+      "repositories": [],
+      "filename": "image.raw.xz",
+      "ostree": {
+        "ref": "test/fedora/iot",
+        "url": "http://fedora.example.com/repo"
+      },
+      "blueprint": {
+        "customizations": {
+          "user": [
+            {
+              "name": "user2",
+              "description": "description 2",
+              "password": "$6$BhyxFBgrEFh0VrPJ$MllG8auiU26x2pmzL4.1maHzPHrA.4gTdCvlATFp8HJU9UPee4zCS9BVl2HOzKaUYD/zEm8r/OF05F2icWB0K/",
+              "key": "ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC61wMCjOSHwbVb4VfVyl5sn497qW4PsdQ7Ty7aD6wDNZ/QjjULkDV/yW5WjDlDQ7UqFH0Sr7vywjqDizUAqK7zM5FsUKsUXWHWwg/ehKg8j9xKcMv11AkFoUoujtfAujnKODkk58XSA9whPr7qcw3vPrmog680pnMSzf9LC7J6kXfs6lkoKfBh9VnlxusCrw2yg0qI1fHAZBLPx7mW6+me71QZsS6sVz8v8KXyrXsKTdnF50FjzHcK9HXDBtSJS5wA3fkcRYymJe0o6WMWNdgSRVpoSiWaHHmFgdMUJaYoCfhXzyl7LtNb3Q+Sveg+tJK7JaRXBLMUllOlJ6ll5Hod root@localhost",
+              "home": "/home/home2",
+              "shell": "/bin/sh",
+              "groups": [
+                "group1"
+              ],
+              "uid": 1020,
+              "gid": 1050
+            },
+            {
+              "name": "user3",
+              "uid": 1060,
+              "gid": 1060
+            }
+          ],
+          "group": [
+            {
+              "name": "group1",
+              "gid": 1030
+            },
+            {
+              "name": "group2",
+              "gid": 1050
+            },
+            {
+              "name": "user3",
+              "gid": 1060
+            }
+          ],
+          "services": {
+            "enabled": [
+              "custom.service"
+            ]
+          },
+          "directories": [
+            {
+              "path": "/etc/systemd/system/custom.service.d"
+            },
+            {
+              "path": "/etc/custom_dir",
+              "mode": "0770",
+              "user": 1020,
+              "group": 1050
+            }
+          ],
+          "files": [
+            {
+              "path": "/etc/systemd/system/custom.service",
+              "data": "[Unit]\nDescription=Custom service\n\n[Service]\nExecStart=/usr/bin/false\n\n[Install]\nWantedBy=multi-user.target\n"
+            },
+            {
+              "path": "/etc/systemd/system/custom.service.d/override.conf",
+              "data": "[Service]\nExecStart=\nExecStart=/usr/bin/cat /etc/custom_file.txt\n"
+            },
+            {
+              "path": "/etc/custom_file.txt",
+              "data": "image builder is the best",
+              "mode": "0644",
+              "user": "root",
+              "group": "root"
+            },
+            {
+              "path": "/etc/empty_file.txt",
+              "user": 0,
+              "group": 0
+            }
+          ]
+        }
+      }
+    },
+    "overrides": {}
+  },
   "openstack": {
     "boot": {
       "type": "openstack"