Port dirinstall gating test from RHEL (sti -> tmt).

This pull request enables tests in the Fedora CI using `tmt` which
also allows to easily execute and debug tests from your laptop:

Run tests directly on your localhost:

    sudo dnf install -y tmt
    tmt run --all provision --how local

Run tests in a virtual machine:

    sudo dnf install -y tmt-provision-virtual
    tmt run

Check the documentation to learn more about the tool:
https://docs.fedoraproject.org/en-US/ci/tmt/

.fmf/version

@@ -0,0 +1 @@
+1

plans/dirinstall.fmf

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+summary: Integration test - dirinstall on regular system
+provision:
+    standard-inventory-qcow2:
+        qemu:
+            m: 2G
+prepare:
+    how: install
+    package:
+      - anaconda
+      # gnome-kiosk is required for "vnc" mode
+      - gnome-kiosk
+execute:
+    script:
+      - ANACONDA_UI_MODE=text plans/dirinstall.sh
+      - plans/show_logs.sh
+      - ANACONDA_UI_MODE=vnc plans/dirinstall.sh
+      - plans/show_logs.sh
+      - journalctl -a

plans/dirinstall.sh

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+#!/bin/sh -eux
+
+
+# Prepare test work directory
+
+WORK_DIR=$(mktemp -d /var/tmp/dirinstall.XXXXXX)
+
+
+# Create kickstart
+
+KICKSTART_PATH=${WORK_DIR}/ks.cfg
+source plans/repositories
+TEST_KICKSTART=plans/ks.dirinstall.cfg
+
+# Dump URLs of installation repositories found in local repositories whose names are configured in 'repositories' file
+echo "url --metalink=$(dnf repoinfo $BASE_REPO | grep ^Repo-metalink | cut -d: -f2- | sed 's/^ *//')" > ${KICKSTART_PATH}
+for repo in $REPOS; do
+    echo "repo --name=$repo --metalink=$(dnf repoinfo $repo | grep ^Repo-metalink | cut -d: -f2- | sed 's/^ *//')" >> ${KICKSTART_PATH}
+done
+
+cat ${TEST_KICKSTART} >> ${KICKSTART_PATH}
+
+# Log the kickstart
+cat ${KICKSTART_PATH}
+
+
+# Run dirinstall
+
+INSTALL_DIR=${WORK_DIR}/install_dir
+mkdir ${INSTALL_DIR}
+
+anaconda --dirinstall ${INSTALL_DIR} --kickstart ${KICKSTART_PATH} --${ANACONDA_UI_MODE} --noninteractive 2>&1
+
+
+# Remove test work directory
+
+rm -rf ${WORK_DIR}

plans/ks.dirinstall.cfg

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+# The repository configuration (url, repo) needs to be added here.
+# It varies by the product and version we are running on / testing
+
+lang en_US.UTF-8
+keyboard --vckeymap=us --xlayouts='us'
+rootpw --plaintext redhat
+timezone --utc Europe/Prague
+
+shutdown
+
+%packages
+%end

plans/repositories

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+# Names of local repositories whose urls will be used for installation
+# Repositories for "Fedora X" release:
+BASE_REPO="fedora"
+REPOS="fedora-modular"

plans/show_logs.sh

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+#!/bin/sh -x
+
+ls /tmp
+
+LOG_DIR=/tmp
+
+cd ${LOG_DIR}
+KS_SCRIPT_LOGS=$(ls ks-script-*.log)
+cd -
+
+ANACONDA_LOGS="anaconda.log storage.log packaging.log program.log dbus.log dnf.librepo.log ${KS_SCRIPT_LOGS}"
+
+for log in ${ANACONDA_LOGS} ; do
+    LOG_PATH=${LOG_DIR}/${log}
+    if [ -f ${LOG_PATH} ]; then
+        echo "----------------------- Dumping log file $LOG_PATH:"
+        cat $LOG_PATH
+        # clear for the following test
+        rm $LOG_PATH
+    fi
+done