Install data files in proper path

Bash completion script is installed in /usr/local/etc, so
install_rally.sh should make a symlink in /etc/bash_completion.d/

Also move `data_files` section from setup.py to setup.cfg

Closes-Bug: 1463038
Change-Id: Ifd5f69e41aa8121129d6314130385f48e1690843

setup.cfg

@@ -23,6 +23,10 @@ classifier =
 packages =
     rally
 
+data_files =
+    etc/bash_completion.d =
+        etc/rally.bash_completion
+
 [entry_points]
 console_scripts =
     rally = rally.cli.main:main

setup.py

@@ -25,17 +25,6 @@ try:
 except ImportError:
     pass
 
-import os
-if os.getuid() == 0:
-    data_files = [
-        ('/etc/bash_completion.d', ['etc/rally.bash_completion']),
-        ]
-else:
-    data_files = [
-        ('etc/bash_completion.d', ['etc/rally.bash_completion']),
-        ]
-
 setuptools.setup(
     setup_requires=['pbr'],
-    data_files=data_files,
     pbr=True)

tests/ci/test_install.sh

@@ -19,12 +19,14 @@ env
 
 sudo ./install_rally.sh --system --yes
 rally deployment list
+[ -d /etc/bash_completion.d ] && cat /etc/bash_completion.d/rally.bash_completion || true
 
 sudo ./install_rally.sh --system --yes
 rally deployment list
 
 sudo ./install_rally.sh --yes -d /tmp/rallytest_root/
 /tmp/rallytest_root/bin/rally deployment list
+cat /tmp/rallytest_root/etc/bash_completion.d/rally.bash_completion
 
 sudo rm -fr ~/.rally