Add support for rct cat-manifest to print virt_limit attribute

[sideangleside]

Add support for rct cat-manifest to print virt_limit attribute. This attribute helps the user determine if virt-who is required.

Additionally, output a new 'Requires virt-who field' set to

• False - if VIRT_LIMIT attribute == 0 or is nil/None
• True - otherwise

Example output:

        Name: Red Hat Enterprise Linux Server, Premium (4 sockets) (Unlimited guests)
        Quantity: 50
        Created: 2015-09-07T10:51:26.000+0000
        Start Date: 2015-08-26T04:00:00.000+0000
        End Date: 2016-08-26T03:59:59.000+0000
        Service Level: Premium
        Service Type: L1-L3
        Architectures: x86_64,ppc64le,ppc64,ia64,ppc,x86,s390,s390x
        SKU: *****
        Contract: *****
        Order: *****
        Account: *****
        Virt Limit: unlimited
        Requires Virt-who: True

[wottop]

Fails nosetest
subscription-manager/test/test_rct_manifest_command.py", line 74, in test_cat_manifest

[barnabycourt]

@candlepin-pull-request-bot test this please

[barnabycourt]

@candlepin-pull-request-bot test this please

[Ceiu]

@candlepin-pull-request-bot retest this please

[Ceiu]

Looks like this is failing because the associated tests haven't been updated to expect the new entry. Please update the appropriate tests and push the changes for this PR.

[awood]

Obviated by #1464