add molecule testing against centos:7

molecule/default/Dockerfile.j2

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+{% if item.registry is defined %}
+FROM {{ item.registry.url }}/{{ item.image }}
+{% else %}
+FROM {{ item.image }}
+{% endif %}
+
+{% if item.env is defined %}
+{% for var, value in item.env.items() %}
+{% if value %}
+ENV {{ var }} {{ value }}
+{% endif %}
+{% endfor %}
+{% endif %}
+
+
+
+RUN if [ $(command -v apt-get) ]; then apt-get update && apt-get upgrade -y && apt-get install -y apt-transport-https gnupg2 python3-minimal python3-apt man systemd systemd-sysv rsyslog sudo bash ca-certificates iproute2 && apt-get clean; \
+    elif [ $(command -v dnf) ]; then dnf makecache && dnf --assumeyes upgrade && dnf --assumeyes install python3 sudo python3-devel python*-dnf bash iproute && dnf clean all; \
+    elif [ $(command -v yum) ]; then sed -i 's/^\(tsflags=*\)/# \1/g' /etc/yum.conf && yum makecache fast && yum upgrade -y && yum makecache fast && yum install -y sudo python3 systemd rsyslog man yum-plugin-ovl bash iproute && sed -i 's/plugins=0/plugins=1/g' /etc/yum.conf && yum clean all; \
+    elif [ $(command -v zypper) ]; then zypper refresh && zypper install -y python sudo bash python-xml iproute2 && zypper clean -a; \
+    elif [ $(command -v apk) ]; then apk update && apk add --no-cache python sudo bash ca-certificates; \
+    elif [ $(command -v xbps-install) ]; then xbps-install -Syu && xbps-install -y python sudo bash ca-certificates iproute2 && xbps-remove -O; fi
+
+RUN set -xe \
+  && groupadd -r ${ANSIBLE_USER} \
+  && groupadd -r ${DEPLOY_GROUP} \
+  && useradd -m -g ${ANSIBLE_USER} ${ANSIBLE_USER} \
+  && usermod -aG ${DEPLOY_GROUP} ${ANSIBLE_USER} \
+  && echo "%${DEPLOY_GROUP} ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/ansible
+
+RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == \
+    systemd-tmpfiles-setup.service ] || rm -f $i; done); \
+    rm -rf /lib/systemd/system/multi-user.target.wants/*;\
+    rm -rf /etc/systemd/system/*.wants/*;\
+    rm -rf /lib/systemd/system/local-fs.target.wants/*; \
+    rm -rf /lib/systemd/system/sockets.target.wants/*udev*; \
+    rm -rf /lib/systemd/system/sockets.target.wants/*initctl*; \
+    rm -rf /lib/systemd/system/basic.target.wants/*;\
+    rm -rf /lib/systemd/system/anaconda.target.wants/*;
+
+VOLUME [ "/sys/fs/cgroup" ]
+CMD ["{{ item.command | default('/usr/sbin/init') }}"]

molecule/default/converge.yml

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+---
+- name: Converge
+  hosts: all
+  tasks:
+    - name: "Include netology_devops_vector"
+      ansible.builtin.include_role:
+        name: "dannc.netology_devops_vector"

molecule/default/molecule.yml

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+---
+dependency:
+  name: galaxy
+driver:
+  name: docker
+
+lint: |
+  yamllint .
+  ansible-lint
+platforms:
+  - name: centos_7
+    image: centos:7
+    privileged: true
+    command: /usr/sbin/init
+    capabilities:
+      - SYS_ADMIN
+    tmpfs:
+      - /run
+      - /tmp
+    volumes:
+      - /sys/fs/cgroup:/sys/fs/cgroup
+    env:
+      ANSIBLE_USER: ansible
+      SUDO_GROUP: wheel
+      DEPLOY_GROUP: deployer
+      container: docker
+provisioner:
+  name: ansible
+verifier:
+  name: ansible
+
+scenario:
+  name: default
+  test_sequence:
+    - lint
+    - destroy
+    # - dependency
+    - syntax
+    - create
+    # - prepare
+    - converge
+    - idempotence
+    # - side_effect
+    - verify
+    - destroy

molecule/default/verify.yml

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+---
+- name: Verify
+  hosts: all
+  gather_facts: false
+  tasks:
+  - name: Example assertion
+    ansible.builtin.assert:
+      that: true