When boto and moto are not installed, the BotoVpcTestCaseBase() should
be skipped. _get_boto_version() and _get_moto_version() require that
boto and moto are installed, but are called anyway in the skipIf
condition.
moto versions >= 1.0.0 have changed the way the mocked connections through
boto are handled with the @mock_ec2 decorator. They use the boto3 connection
method. However, since we are still using boto in many places, we need to use
the new @mock_ec2_deprecated decorator instead to handle the boto connection
functions for the unit tests.
Versions of moto < 1.0.0 are not Python 3 compatible, so salt-jenkins should
be installing newer versions of moto for those tests. Unfortunately, we cannot
install an older version of moto for Python2 that use the original @mock_ec2 call
and also import the @mock_ec2_deprecated function for newer versions of moto
simultaneously as the @mock_ec2_deprecated function doesn't exist in older
versions of moto.
