utils: Move text-related functions into separate file

Signed-off-by: Michael Hanselmann <hansmi@google.com>
Reviewed-by: Iustin Pop <iustin@google.com>

Makefile.am

@@ -214,7 +214,8 @@ server_PYTHON = \
 utils_PYTHON = \
 	lib/utils/__init__.py \
 	lib/utils/algo.py \
-	lib/utils/retry.py
+	lib/utils/retry.py \
+	lib/utils/text.py
 
 docrst = \
 	doc/admin.rst \
@@ -482,6 +483,7 @@ python_tests = \
 	test/ganeti.uidpool_unittest.py \
 	test/ganeti.utils.algo_unittest.py \
 	test/ganeti.utils.retry_unittest.py \
+	test/ganeti.utils.text_unittest.py \
 	test/ganeti.utils_mlockall_unittest.py \
 	test/ganeti.utils_unittest.py \
 	test/ganeti.workerpool_unittest.py \