Mount from both fstab and autofs configs via nfs_mounts role

nfs mounts are defined via both autofs and fstab configurations in nfs_mounts role but the way the conditional is defined allows only either mounts from fstab or mounts from autofs to be mounted. This arises from using just one conditional flag in the nfs_mounts/main.yml ansible role. We need to change that to use a separate conditional flag for running autofs.yml and fstab.yml so that both can run.