Duplicate package checks for lvm2

[tabowling]

Both lv and vg tasks are checking for lvm2 package to be installed. This results in duplicate checking which can slow down playbook execution.

[tbowling@tbowling storage]$ grep LVM2 */*
tasks/lv-default.yml:- name: Install LVM2 commands as needed
tasks/vg-default.yml:- name: Install LVM2 commmands as needed

It would be better to check for any packages one time at a global level, This would include any other toolings such as lvm2, parted, or others. A WHEN condition could be used so that you are only checking for those packages when that technology is requested. for example, if use_partitions is false, do not verify that package is installed.

[dwlehman]

#2 should help with this. If you get a chance to test, please provide feedback.