List failed tests and the content of the .failed files

We list the failed tests after dumping the contents of the
.failed files so that eups distrib will be able to report
the failed tests properly.

Switch to .format() for string formatting so as to not repeat
"testsDir" four distinct times.

python/lsst/sconsUtils/scripts.py

@@ -168,13 +168,17 @@ def finish(defaultTargets=DEFAULT_TARGETS,
         if "tests" in [str(t) for t in BUILD_TARGETS]:
             testsDir = pipes.quote(os.path.join(os.getcwd(), "tests", ".tests"))
             checkTestStatus_command = state.env.Command('checkTestStatus', [], """
-                @ if [ -d %s ]; then \
-                      nfail=`find %s -name \*.failed | wc -l | sed -e 's/ //g'`; \
+                @ if [ -d {0} ]; then \
+                      nfail=`find {0} -name \*.failed | wc -l | sed -e 's/ //g'`; \
                       if [ $$nfail -gt 0 ]; then \
+                          echo "Failed test output:" >&2; \
+                          find {0} -name \*.failed -exec cat {{}} \; >&2; \
+                          echo "The following tests failed:" >&2;\
+                          find {0} -name \*.failed >&2; \
                           echo "$$nfail tests failed" >&2; exit 1; \
                       fi; \
                   fi; \
-            """ % (testsDir, testsDir))
+            """.format(testsDir))
 
             state.env.Depends(checkTestStatus_command, BUILD_TARGETS)  # this is why the check runs last
             BUILD_TARGETS.extend(checkTestStatus_command)