Use config generator rc instead of wrapper script

This commit removes the generate_sample wrapper script and adds an
rc file for the config generator to specify the alternate path.
This makes console messages from the generator tooling point
consistent with what is actually being used. Before because a wrapper
was used error messages would recommend running the incorrect tool.

Change-Id: I0ac792454777af6e3f1d718836031f9a14850229
diff --git a/tools/config/oslo.config.generator.rc b/tools/config/oslo.config.generator.rc
new file mode 100644
index 0000000..303e156
--- /dev/null
+++ b/tools/config/oslo.config.generator.rc
@@ -0,0 +1 @@
+MODULEPATH=tempest.common.generate_sample_tempest
diff --git a/tools/generate_sample.sh b/tools/generate_sample.sh
deleted file mode 100755
index 9b312c9..0000000
--- a/tools/generate_sample.sh
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/bin/sh
-MODULEPATH=tempest.common.generate_sample_tempest tools/config/generate_sample.sh $@
diff --git a/tox.ini b/tox.ini
index c1acde9..73546ec 100644
--- a/tox.ini
+++ b/tox.ini
@@ -85,7 +85,6 @@
        -r{toxinidir}/test-requirements.txt
 
 [testenv:pep8]
-setenv = MODULEPATH=tempest.common.generate_sample_tempest
 commands =
    flake8 {posargs}
    {toxinidir}/tools/config/check_uptodate.sh