refactor: add support for Python 3 (#490)

[brettstack]

• feat: add support for Python 3 (feat: add support for Python 3 #428)

• refactor: Updated imports to by Py3 compliant

• refactor: Move class variable creation to constructor in globals.py

Without moving this to the init, the globals.py file will not run
in Py3 because it can't reference the constants.

• refactor: Update update_policy.py to be Py3 compliant

In Py3, the function .iteritems() on a dict was removed and replaced
with .items().

• refactor: Update deployment_preference_collection.py to be Py3 compliant

In Py3, .itervalues() and .iteritems() was replaced with .values() and
.items(), respectfully.

• refactor: Update swagger.py to be Py3 compliant

In Py3, the .keys() method on a dictionary returns a dict_keys object
that is a view into the dictionary. In Py2, it returns a list. To
support Py3, we need to convert the .keys() to a list.

• refactor: Update intrinsics.py to be Py3 compliant

In Py3, the .keys() method on a dictionary returns a dict_keys object
that is a view into the dictionary. In Py2, it returns a list. To
support Py3, we need to convert the .keys() to a list.

• Staging translator.py changes

Updated .iteritems() to items()

• refactor: More updating to be Py3 compliant

• refactor: Make hashing constisent between py2 and py3

• refactor: Make exceptions sortable to allow error case tests to pass in Py3

• fix: add support for Python 3 (fix: Fixing unit tests to work in Python 3 #445)

• refactor: Updated imports to by Py3 compliant

• refactor: Move class variable creation to constructor in globals.py

Without moving this to the init, the globals.py file will not run
in Py3 because it can't reference the constants.

• refactor: Update update_policy.py to be Py3 compliant

In Py3, the function .iteritems() on a dict was removed and replaced
with .items().

• refactor: Update deployment_preference_collection.py to be Py3 compliant

In Py3, .itervalues() and .iteritems() was replaced with .values() and
.items(), respectfully.

• refactor: Update swagger.py to be Py3 compliant

In Py3, the .keys() method on a dictionary returns a dict_keys object
that is a view into the dictionary. In Py2, it returns a list. To
support Py3, we need to convert the .keys() to a list.

• refactor: Update intrinsics.py to be Py3 compliant

In Py3, the .keys() method on a dictionary returns a dict_keys object
that is a view into the dictionary. In Py2, it returns a list. To
support Py3, we need to convert the .keys() to a list.

• Staging translator.py changes

Updated .iteritems() to items()

• refactor: More updating to be Py3 compliant

• refactor: Make hashing constisent between py2 and py3

• refactor: Make exceptions sortable to allow error case tests to pass in Py3

• feat: Run tox from Travis-CI

• feat: Update tox to run in Py2 and Py3

• refactor: Force sorting behavior to be Py2 compatible and update Deployment logicalid hash

• fix: Update tox to run tests against Py27 and Py36

• Update Travis config to run Py2 and Py3 tests in parallel

• Setting region env var in tox file for Travis to pick up

• Set AWS region in travis file

• Pass AWS_* env vars to tox

• Fixing ordering of resource types in Globals error message

• Py2/3 compatible implementation of string encoding for logicalId generator

Also added lots of comments explaining why/how the deep sorting of lists
work in unit tests

• Removing redundant usage of bytes

Issue #, if available:

Description of changes:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[digioak-zz]

Ship