Add role to install LBNL Node Health Check tool

ansible/roles/install_nhc/tasks/main.yml

+---
+- name: Download the rpm
+  ansible.builtin.get_url:
+    url: "{{ nhc_download_url }}"
+    dest: "{{ nhc_download_path }}"
+
+- name: Clone the NHC config repo
+  ansible.builtin.git:
+    repo: "{{ nhc_git_repo }}"
+    dest: "{{ nhc_git_repo_path }}"
+
+- name: Install NHC
+  ansible.builtin.yum:
+    name: "{{ nhc_download_path }}"
+    state: latest
+
+- name: Create test files to ensure that a file on GPFS is readable
+  ansible.builtin.file:
+    path: "{{ item }}"
+    state: touch
+  loop:
+    - /data/.nhc-test 
+    - /scratch/.nhc-test
+
+- name: Copy config files
+  ansible.builtin.copy:
+    src: "{{ nhc_git_repo_path }}/{{ item.src }}" 
+    dest: "{{ item.dest }}"
+    owner: root
+    group: root
+    mode: '0644'
+    remote_src: true
+  loop:
+    - { src: 'nhc/nhc.conf' , dest: '/etc/nhc/' }
+    - { src: 'nhc/nhc.etc.sysconfig', dest: '/etc/sysconfig/nhc/' }
+