Build all available coverage xml and html, even if some is missing

rakefile

@@ -198,7 +198,7 @@ namespace :coverage do
     desc "Build the html coverage reports"
     task :html => :report_dirs do
         TEST_TASK_DIRS.each do |dir|
-            sh("coverage html --rcfile=#{dir}/.coveragerc")
+            sh("coverage html --rcfile=#{dir}/.coveragerc || echo 'Unable to build coverage html for #{dir}'")
         end
     end
 
@@ -206,7 +206,7 @@ namespace :coverage do
     task :xml => :report_dirs do
         TEST_TASK_DIRS.each do |dir|
             # Why doesn't the rcfile control the xml output file properly??
-            sh("coverage xml -o reports/#{dir}/coverage.xml --rcfile=#{dir}/.coveragerc")
+            sh("coverage xml -o reports/#{dir}/coverage.xml --rcfile=#{dir}/.coveragerc || echo 'Unable to build coverage xml for #{dir}'")
         end
     end