verify fails to run if given the current directory

[jsm84]

There is a regression in recent versions of operator courier (this was working in 2.0.x branch, IIRC), where running operator-courier verify from within a valid bundle directory fails with the following error:

[jmanning@fedora30 turbonomic]$ ls
t8c-operator.crd.yaml  t8c-operator.package.yaml  t8c-operator.v7.16.0.clusterserviceversion.yaml
[jmanning@fedora30 bundle]$ operator-courier verify ./
list index out of range

And also:

[jmanning@fedora30 turbonomic]$ operator-courier verify --ui_validate_io ./
list index out of range

But running this works:

[jmanning@fedora30 operator-metadata]$ operator-courier verify --ui_validate_io turbonomic/
[jmanning@fedora30 operator-metadata]$