Move vSphere specific methods out of VMPooler

VMPooler has the vSphere provider taken out, moving some vSphere related
methods to the provider:

1) pool_folders
2) get_base_folders

And the related spec tests.
At the same time renaming some configuration and code items
to remove harmful terminology.
Note this version of the vsphere provider needs to run on vmpooler
that also contain the renaming changes (version >2.1)

lib/vmpooler/providers/vsphere.rb

@@ -51,8 +51,8 @@ module Vmpooler
           'vsphere'
         end
 
-        def folder_configured?(folder_title, base_folder, configured_folders, whitelist)
-          return true if whitelist&.include?(folder_title)
+        def folder_configured?(folder_title, base_folder, configured_folders, allowlist)
+          return true if allowlist&.include?(folder_title)
           return false unless configured_folders.keys.include?(folder_title)
           return false unless configured_folders[folder_title] == base_folder
 
@@ -119,7 +119,30 @@ module Vmpooler
           try >= max_tries ? raise : retry
         end
 
-        def purge_unconfigured_folders(base_folders, configured_folders, whitelist)
+        # Return a list of pool folders
+        def pool_folders(provider_name)
+          folders = {}
+          $config[:pools].each do |pool|
+            next unless pool['provider'] == provider_name.to_s
+
+            folder_parts = pool['folder'].split('/')
+            datacenter = get_target_datacenter_from_config(pool['name'])
+            folders[folder_parts.pop] = "#{datacenter}/vm/#{folder_parts.join('/')}"
+          end
+          folders
+        end
+
+        def get_base_folders(folders)
+          base = []
+          folders.each do |_key, value|
+            base << value
+          end
+          base.uniq
+        end
+
+        def purge_unconfigured_resources(allowlist)
+          configured_folders = pool_folders(name)
+          base_folders = get_base_folders(configured_folders)
           @connection_pool.with_metrics do |pool_object|
             connection = ensured_vsphere_connection(pool_object)
 
@@ -129,7 +152,7 @@ module Vmpooler
 
               folder_children.each do |folder_hash|
                 folder_hash.each do |folder_title, folder_object|
-                  destroy_folder_and_children(folder_object) unless folder_configured?(folder_title, base_folder, configured_folders, whitelist)
+                  destroy_folder_and_children(folder_object) unless folder_configured?(folder_title, base_folder, configured_folders, allowlist)
                 end
               end
             end