Change the value of lmod db host var

ansible/group_vars/all

@@ -2,5 +2,5 @@
   #This file path is relative to the ansible playbook.
   pkg_list_file: "cheaha-compute-yum-pkg-list.txt"
 
-  lmod_db_host_machine: "ohpc"
+  lmod_db_host_machine: "cheaha-master01"
   driver_run_file_link: "https://developer.download.nvidia.com/compute/cuda/11.8.0/local_installers/cuda_11.8.0_520.61.05_linux.run"