ipapython: remove default_encoding_utf8

Replace the "import default_encoding_utf8" in ipalib/cli.py with equivalent
Python code.

https://fedorahosted.org/freeipa/ticket/5596

Reviewed-By: Tomas Babej <tbabej@redhat.com>

.gitignore

@@ -73,7 +73,6 @@ freeipa2-dev-doc
 /ipapython/setup.py
 /ipapython/version.py
 !/ipapython/Makefile
-!/ipapython/py_default_encoding/Makefile
 !/ipapython/ipap11helper/Makefile
 
 /ipaplatform/__init__.py