use 1 coveragerc file to generate 1 coverage report per build

scripts/jenkins-report.sh

@@ -1,11 +1,8 @@
 #!/usr/bin/env bash
 source scripts/jenkins-common.sh
 
-# Combine the data files that were generated using -p
-paver combine_jenkins_coverage
-
 # Get the diff coverage and html reports for unit tests
-NO_PREREQ_INSTALL=true paver coverage
+paver coverage
 
 # Get coverage reports for bok choy
 # paver bokchoy_coverage