meta-oniro-core: create oniro-user class

oniro-user is a class that can be inherited in local.conf
and it adds a user named oniro with default password oniro.
The class also installs sudo and adds oniro to the suders.

Signed-off-by: Davide Gardenal <davide.gardenal@huawei.com>

meta-oniro-core/classes/oniro-user.bbclass

+# SPDX-FileCopyrightText: Huawei Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# Add a new user named oniro with default password oniro
+inherit extrausers
+
+# This is a sha512 hash of the word "oniro"
+# To generate a new password run the following command:
+# $ mkpasswd -m sha512crypt
+# WARNING: this is a temporary solution until we have a provisioning solution to set up the initial password
+ONIRO_USER_PASSWORD ?= "\$6\$cI/pmFRW1S8seZ24\$e/7XAuVsOBgoAEmlKQnk54.jQEpRuQmmzik6.1Osaji7ca.04N70Ji.PN86sFXBvqwDGhhSr.jqZsDDA8OVuy."
+
+EXTRA_USERS_PARAMS = "\
+    useradd -p '${ONIRO_USER_PASSWORD}' oniro; \
+"
+
+IMAGE_INSTALL:append = " sudo"
+
+# Add to PATH:  
+#   - /usr/local/sbin
+#   - /usr/sbin
+#   - /sbin
+# Add oniro to the sudo users
+init_user_oniro () {
+	echo "export PATH=\$PATH:/usr/local/sbin:/usr/sbin:/sbin" >> ${IMAGE_ROOTFS}/home/oniro/.bashrc
+	echo "oniro ALL=(ALL:ALL) ALL" > ${IMAGE_ROOTFS}/etc/sudoers.d/oniro
+}
+
+ROOTFS_POSTPROCESS_COMMAND:append = " init_user_oniro;"