Naively merge all Python modules into one. (#3148)

* naively merge all python base modules into one

* Formatting changes.

Co-authored-by: Davin Chia <davinchia@gmail.com>

airbyte-cdk/python/airbyte_cdk/base_python/cdk/utils/__init__.py

@@ -0,0 +1 @@
+# Initialize Utils Package

airbyte-cdk/python/airbyte_cdk/base_python/cdk/utils/casing.py

@@ -0,0 +1,32 @@
+
+# MIT License
+# 
+# Copyright (c) 2020 Airbyte
+# 
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+# 
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+
+
+import re
+
+
+# https://stackoverflow.com/a/1176023
+def camel_to_snake(s):
+    s = re.sub("(.)([A-Z][a-z]+)", r"\1_\2", s)
+    return re.sub("([a-z0-9])([A-Z])", r"\1_\2", s).lower()