change xenial to bionic for using python3.6 and fix pytest script.

.travis.yml

@@ -90,6 +90,7 @@ matrix:
         esac
 
   - os: linux
+    dist: bionic
     language: c
     compiler: gcc
     env: COVERITY_SCAN=true
@@ -125,6 +126,7 @@ matrix:
         branch_pattern: coverity_scan
 
   - os: linux
+    dist: bionic
     language: c
     compiler: gcc
     env: ENV_COVER=true
@@ -230,6 +232,7 @@ matrix:
       - make > /dev/null
 
   - os: linux
+    dist: bionic
     language: c
     compiler: clang
     env: DESC="linux/clang build"

tests/test-all.sh

@@ -33,9 +33,9 @@ echo "### run Python script ###"
 cd ../pytest
 
 if [ "$1" == "cron" ]; then
-  ./fulltest.sh > /dev/null | tee pytest-out.txt
+  ./fulltest.sh 2>&1 | grep 'successfully executed\|failed\|fault' | grep -v 'default'| tee pytest-out.txt
 else
-  ./smoketest.sh > /dev/null | tee pytest-out.txt
+  ./smoketest.sh 2>&1 | grep 'successfully executed\|failed\|fault' | grep -v 'default'| tee pytest-out.txt
 fi
 totalPySuccess=`grep 'successfully executed' pytest-out.txt | wc -l`