Re-enable flatpak_remote tests (#2747)

* Automate test repo creation, re-enable flatpak_remote tests.

* Linting.

* Another try.

tests/integration/targets/flatpak_remote/aliases

@@ -6,4 +6,3 @@ skip/osx
 skip/macos
 skip/rhel
 needs/root
-disabled  # FIXME

tests/integration/targets/setup_flatpak_remote/create-repo.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+set -eux
+
+flatpak install -y --system flathub org.freedesktop.Platform//1.6 org.freedesktop.Sdk//1.6
+
+echo $'#!/bin/sh\necho hello world' > hello.sh
+
+export NUM=1
+flatpak build-init appdir$NUM com.dummy.App$NUM org.freedesktop.Sdk org.freedesktop.Platform 1.6;
+flatpak build appdir$NUM mkdir /app/bin;
+flatpak build appdir$NUM install --mode=750 hello.sh /app/bin;
+flatpak build-finish --command=hello.sh appdir$NUM
+
+flatpak build-export repo appdir$NUM stable
+
+mkdir -p gpg
+chmod 0700 gpg
+gpg --homedir gpg --batch --passphrase '' --quick-gen-key test@dummy.com future-default default 10y
+
+KEY_ID=$(gpg --homedir=gpg --list-keys --with-colons test@dummy.com | grep fpr: | head -1 | cut -d ':' -f 10)
+
+gpg --homedir=gpg --export "${KEY_ID}" > dummy-repo.gpg
+
+BASE64_PUBLIC_KEY=$(base64 dummy-repo.gpg | tr -d '\n')
+
+cat > repo/com.dummy.App1.flatpakref <<EOF
+[Flatpak Ref]
+Title=Dummy App$NUM
+Name=com.dummy.App$NUM
+Branch=stable
+Url=file:///tmp/flatpak/repo
+GPGKey=${BASE64_PUBLIC_KEY}
+IsRuntime=false
+RuntimeRepo=https://flathub.org/repo/flathub.flatpakrepo
+EOF
+
+cat > repo/dummy-repo.flatpakrepo <<EOF
+[Flatpak Repo]
+Title=Dummy Repo
+Url=file:///tmp/flatpak/repo
+Comment=Dummy repo for ansible module integration testing
+Description=Dummy repo for ansible module integration testing
+GPGKey=${BASE64_PUBLIC_KEY}
+EOF
+
+flatpak build-sign repo --gpg-sign="${KEY_ID}" --gpg-homedir=gpg
+flatpak build-update-repo repo --gpg-sign="${KEY_ID}" --gpg-homedir=gpg
+tar cvfJ repo.tar.xz repo/
+mv repo.tar.xz files/
+
+rm -rf appdir* dummy-repo.gpg gpg hello.sh repo