* examples/verifydetails.py: Only import the topmost module 'gpg' and
update the code accordingly.
* tests/support.py: Likewise.
* tests/t-callbacks.py: Likewise.
* tests/t-data.py: Likewise.
* tests/t-decrypt-verify.py: Likewise.
* tests/t-decrypt.py: Likewise.
* tests/t-edit.py: Likewise.
* tests/t-encrypt-large.py: Likewise.
* tests/t-encrypt-sign.py: Likewise.
* tests/t-encrypt-sym.py: Likewise.
* tests/t-encrypt.py: Likewise.
* tests/t-export.py: Likewise.
* tests/t-file-name.py: Likewise.
* tests/t-import.py: Likewise.
* tests/t-keylist.py: Likewise.
* tests/t-sig-notation.py: Likewise.
* tests/t-sign.py: Likewise.
* tests/t-signers.py: Likewise.
* tests/t-trustlist.py: Likewise.
* tests/t-verify.py: Likewise.
* tests/t-wait.py: Likewise.
* tests/t-wrapper.py: Likewise.