Add --id with 'file' option to enroll and pickup actions, deprecate --pickup-id and --pickup-id-file

[tr1ck3r]

BUSINESS PROBLEM The enroll and pickup actions use different parameters (--pickup-id and --pickup-id-file) for specifying the Venafi ID of a certificate than the renew and revoke actions do (--id and --id file:). Although a minor inconsistency, it has caused confusion for new VCert users and shorter command line strings are preferred.

PROPOSED SOLUTION Add the --id parameter to the enroll and pickup actions that behaves the same as that parameter does for the renew and revoke actions (i.e. allows you to specify the ID string directly or a file whose content is the ID string). When --id is available, the --pickup-id and --pickup-id-file should be deprecated (still supported, just not listed in the help for the actions or in other VCert documentation) since they would be redundant.

CURRENT ALTERNATIVES The --pickup-id and --pickup-file-id provide the required functionality, they're just inconsistent with other actions.