[python] Fixes additional_properties_type for models (#8802)

* Fixes additionalProperties values for models, updates docs, adds tag test of it, fixes frit and gmfruit tests

* Moves this.setDisallowAdditionalPropertiesIfNotPresent higher

* Makes setting additional_properties_model_instances contingent on the presence of addprosp in schema, updates sample spec composed schemas to remove addprops False form two

* Fixes oneOf anyOf allOf instantiation logic

* Removes Address from Cat definition

* Adds required vars for apple and banana, removes required vars from composed schema init sig

* Updates composed schema vars to be set on self and all composed instances

* Removes get_unused_args, get_var_name_to_model_instances, and get_additional_properties_model_instances

* Fixes fruit + deserilization tests, creates ComposedSchemaWithPropsAndNoAddProps

* Fixes FruitReq tests

* Fixes GmFruit tests

* Fixes discard_unknown_keys tests

* Samples updated

* Removes additionalproperties False in Child

* Samples updated

* Improves handling of v2 and v3 specs for isFreeFormObject, v2 sample spec updated with link to bug

* Adds cli option disallowAdditionalPropertiesIfNotPresent to python

* Adds getAdditionalProperties method so the value for addProps will be correct

* Reverts file

* Reverts file

* Updates python doc

* Reverted anytype_3 definition

* Updates test_deserialize_lizard

* Updates test_deserialize_dict_str_dog

* Updates testDog

* Updates testChild

* Adds v2 python_composition sample

* Adds needed files for python testing

* Adds existing tests into the new python sample

* Fixes test_dog

* Removes addProps false form Dog

* Fixes testChild

* Updates how additionalProperties are set

* Fixes empty_map type

* Type generation fixed for v2 and v3 specs

* Refactors getTypeString, updates artifactids in pom.xml files

* Adds new python sample to CI testing I think

* Fixes artifactId collision, regenrates docs

samples/client/petstore/python_disallowAdditionalPropertiesIfNotPresent/test_python.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+REQUIREMENTS_FILE=dev-requirements.txt
+REQUIREMENTS_OUT=dev-requirements.txt.log
+SETUP_OUT=*.egg-info
+VENV=venv
+DEACTIVE=false
+
+export LC_ALL=en_US.UTF-8
+export LANG=en_US.UTF-8
+
+### set virtualenv
+if [ -z "$VIRTUAL_ENV" ]; then
+		virtualenv $VENV --no-site-packages --always-copy
+		source $VENV/bin/activate
+    DEACTIVE=true
+fi
+
+### install dependencies
+pip install -r $REQUIREMENTS_FILE | tee -a $REQUIREMENTS_OUT
+
+### run tests
+tox || exit 1
+
+### static analysis of code
+#flake8 --show-source petstore_api/
+
+### deactivate virtualenv
+#if [ $DEACTIVE == true ]; then
+#    deactivate
+#fi