add null checks to summaries #731

Job	Run time
lint / pre-commit	16s
test_mvn / test_mvn (orcid-message-listener)	2m 40s
test_mvn / test_mvn (orcid-activemq)	2m 53s
test_mvn / test_mvn (orcid-api-web)	4m 29s
test_mvn / test_mvn (orcid-internal-api)	3m 0s
test_mvn / test_mvn (orcid-pub-web)	3m 7s
test_mvn / test_mvn (orcid-scheduler-web)	2m 50s
test_mvn / test_mvn (orcid-web)	3m 44s
test_mvn / test_mvn (orcid-utils)	2m 52s
test_mvn / test_mvn (orcid-core)	6m 29s
test_mvn / test_mvn (orcid-persistence)	3m 44s
test_mvn / test_mvn (orcid-api-common)	3m 34s
	39m 38s

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