fix some problems. Commit change for 2.2.1 version

1. PoshWSUS.psm1 signing problem. Change UCS-2 Big endian to ANSI
2. Get-PoshWSUSConfigProxyServer,
Get-PoshWSUSConfigSyncUpdateCategories. Add -NOT in wsus variable
checking.
3. Get-PoshWSUSConfigEnabledUpdateLanguages. Fix mising $config variable
creation.
4. Get-PoshWSUSConfigSupportedUpdateLanguages. Fix mising $config
variable creation.
5. Get-PoshWSUSConfigSyncSchedule. Remove Bergin Process End block. Add
$subscription variable creation.
9. Get-PoshWSUSConfigSyncUpdateClassifications. Add -NOT in wsus
variable checking.
10. Updated Help.