Update coverage source paths

Author: TimPansino

tox.ini

@@ -601,8 +601,8 @@ source = newrelic
 [coverage:paths]
 source =
     newrelic/
-    .tox/**/site-packages/newrelic/
-    /__w/**/site-packages/newrelic/
+    **/site-packages/newrelic/
+    **\site-packages\newrelic\
 
 [coverage:html]
 directory = ${TOX_ENV_DIR-.}/htmlcov