Fix nova coverage.

Nova coverage was broken because additional coverage tests were added
that interfere with collecting coverage during unit testing. These new
tests were not properly excluded by the coverage unit test regex. Modify
the regex to exclude any tests of the form '.*test.*coverage.*'. This
allows `tox -ecover` and `run_tests.sh --coverage` to run properly.

Change-Id: Id35f50ec335707c9eadb0e7fb3aa0833661f7333

run_tests.sh

@@ -81,7 +81,7 @@ function run_tests {
   if [ $coverage -eq 1 ]; then
     # Do not test test_coverage_ext when gathering coverage.
     if [ "x$testrargs" = "x" ]; then
-      testrargs="^(?!.*test_coverage_ext).*$"
+      testrargs="^(?!.*test.*coverage).*$"
     fi
     export PYTHON="${wrapper} coverage run --source nova --parallel-mode"
   fi

tox.ini

@@ -38,7 +38,7 @@ commands = python tools/flakes.py nova
 # tests conflict with coverage.
 commands =
   python setup.py testr --coverage \
-    --testr-args='^(?!.*test_coverage_ext).*$'
+    --testr-args='^(?!.*test.*coverage).*$'
 
 [testenv:venv]
 commands = {posargs}