Debug silent exception source.

jjb/pipeline/voltha/bbsim-tests.grooy
-------------------------------------
  o Wrap function calls with enter()/leave() pairs to show progress.

vars/getVolthaCode.groovy
-------------------------
  o Apply automatic editor formatting, indentation jumbled at some point.
  o Added debug functions enter() & leave().
  o Wrap checkouts / function calls with enter()/leave() pairs to
    log script progress.

Change-Id: I7816583072403d20c7c89b119f84835f886a9bdb
diff --git a/jjb/pipeline/voltha/bbsim-tests.groovy b/jjb/pipeline/voltha/bbsim-tests.groovy
index 991ff5b..84752c8 100644
--- a/jjb/pipeline/voltha/bbsim-tests.groovy
+++ b/jjb/pipeline/voltha/bbsim-tests.groovy
@@ -538,6 +538,7 @@
     stages {
         stage('Download Code') {
             steps {
+                enter('getVolthaCode')
                 getVolthaCode([
                     branch: "${branch}",
                     gerritProject: "${gerritProject}",
@@ -545,6 +546,7 @@
                     volthaSystemTestsChange: "${volthaSystemTestsChange}",
                     volthaHelmChartsChange: "${volthaHelmChartsChange}",
                 ])
+                leave('getVolthaCode')
             }
         }
 
@@ -555,9 +557,11 @@
             }
 
             steps {
+                enter('buildVolthaComponent')
                 // NOTE that the correct patch has already been checked out
                 // during the getVolthaCode step
                 buildVolthaComponent("${gerritProject}")
+                leave('buildVolthaComponent')
             }
         }