Investigate failing SONAR job.

[INFO] + tox -e cover
[INFO] cover create: /w/workspace/optf-fgps-sonar/engine/.tox/cover
[INFO] cover installdeps: -r/w/workspace/optf-fgps-sonar/engine/requirements.txt, -r/w/workspace/optf-fgps-sonar/engine/test-requirements.txt
[INFO] cover develop-inst: /w/workspace/optf-fgps-sonar/engine
[INFO] cover installed: amqp==2.5.1,appdirs==1.4.3,attrs==19.3.0,Babel==2.7.0,bcrypt==3.1.7,certifi==2019.9.11,cffi==1.13.2,chardet==3.0.4,Click==7.0,cliff==2.16.0,cmd2==0.8.9,coverage==4.5.4,crypto==1.4.1,cryptography==2.8,daiquiri==1.6.0,debtcollector==1.22.0,decorator==4.4.1,dogpile.cache==0.9.0,extras==1.0.0,fasteners==0.15,fixtures==3.0.0,flake8==2.2.4,future==0.18.2,hacking==0.10.3,idna==2.8,importlib-metadata==0.23,iso8601==0.1.12,Jinja2==2.10.3,jmespath==0.9.4,jsonpatch==1.24,jsonpointer==2.0,jsonschema==3.1.1,junitxml==0.7,keystoneauth1==3.18.0,kombu==4.6.5,linecache2==1.0.0,MarkupSafe==1.1.1,mccabe==0.2.1,mock==3.0.5,monotonic==1.5,more-itertools==7.2.0,mox3==0.28.0,msgpack==0.6.2,munch==2.5.0,Naked==0.1.31,netaddr==0.7.19,netifaces==0.10.9,-e git://cloud.onap.org/mirror/optf/fgps@0ae7f12d73cd9eb92a8779295e414c6471fd045a#egg=of_fgps&subdirectory=engine,openstacksdk==0.37.0,os-client-config==1.33.0,os-service-types==1.7.0,os-testr==1.1.0,oslo.concurrency==3.30.0,oslo.config==6.11.1,oslo.context==2.23.0,oslo.i18n==3.24.0,oslo.log==3.44.1,oslo.serialization==2.29.2,oslo.utils==3.41.2,oslotest==3.8.1,paramiko==2.6.0,pbr==0.11.1,pep8==1.5.7,pifpaf==2.2.2,positional==1.2.1,prettytable==0.7.2,psutil==5.6.4,pycparser==2.19,pycrypto==2.6.1,pyflakes==0.8.1,pyinotify==0.9.6,PyNaCl==1.3.0,pyparsing==2.4.4,pyperclip==1.7.0,pyrsistent==0.15.5,python-dateutil==2.8.1,python-keystoneclient==3.6.0,python-mimeparse==1.6.0,python-novaclient==2.18.0,python-subunit==1.3.0,pytz==2018.9,PyYAML==5.1.2,requests==2.21.0,requests-mock==1.7.0,requestsexceptions==1.4.0,rfc3986==1.3.2,shellescape==3.4.1,simplejson==3.16.0,six==1.12.0,stestr==2.5.1,stevedore==1.31.0,tempest==22.1.0,testrepository==0.0.20,testscenarios==0.5.0,testtools==2.3.0,traceback2==1.4.0,unittest2==1.1.0,urllib3==1.24.3,vine==1.3.0,voluptuous==0.11.7,wcwidth==0.1.7,wrapt==1.11.2,xattr==0.9.6,zipp==0.6.0
[INFO] cover run-test-pre: PYTHONHASHSEED='1193699311'
[INFO] cover run-test: commands[0] | coverage erase
[INFO] cover run-test: commands[1] | find . -type f -name '*.pyc' -delete
[INFO] cover run-test: commands[2] | find . -type f -name '.coverage.*' -delete
[INFO] cover run-test: commands[3] | /w/workspace/optf-fgps-sonar/engine/tools/pretty_tox.sh ''
[INFO] ERROR: InvocationError for command /w/workspace/optf-fgps-sonar/engine/tools/pretty_tox.sh '' (exited with code 2)
[INFO] ___________________________________ summary ____________________________________
[INFO] ERROR: cover: commands failed
[INFO] + deactivate
[INFO] + unset -f pydoc
[INFO] + '[' -z _ ']'
[INFO] + PATH=/home/jenkins/bin:/home/jenkins/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/opt/puppetlabs/bin
[INFO] + export PATH
[INFO] + unset _OLD_VIRTUAL_PATH
[INFO] + '[' -z '' ']'
[INFO] + '[' -n /bin/bash ']'
[INFO] + hash -r
[INFO] + '[' -z _ ']'
[INFO] + PS1=
[INFO] + export PS1
[INFO] + unset _OLD_VIRTUAL_PS1
[INFO] + unset VIRTUAL_ENV
[INFO] + '[' '!' '' = nondestructive ']'
[INFO] + unset -f deactivate
[INFO] + rm -rf ./venv-tox ./.tox
[INFO]
[INFO] — build-helper-maven-plugin:3.0.0:attach-artifact (attach-artifacts) @ fgps-engine —
[INFO] Skip attaching artifacts