Remove .pyc files before performing functional tests

This will remove the .pyc files from the functionaltests path.
Will avoid conditions where timestamps get out of sync.

Change-Id: I8bb3b96d6164eb365477cf6cc1eb2cf38f6d4206

tox.ini

@@ -7,6 +7,7 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
 commands =
+    /usr/bin/find . -type f -name "*.pyc" -delete
     python setup.py testr --coverage --testr-args='{posargs}'
     coverage combine
     coverage report -m
@@ -26,6 +27,7 @@ deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 
 commands =
+    /usr/bin/find . -type f -name "*.pyc" -delete
     python -m testtools.run \
       barbican.tests.common.test_utils \
       barbican.tests.common.test_hrefs \
@@ -60,6 +62,7 @@ commands=
 deps = -r{toxinidir}/test-requirements.txt
 setenv = OS_TEST_PATH={toxinidir}/functionaltests
 commands =
+    /usr/bin/find . -type f -name "*.pyc" -delete
     /bin/bash {toxinidir}/functionaltests/pretty_tox.sh '{posargs}'
 
 [flake8]