Hurlbert database importer does not parse source for some lines, fails to parse collection dates

[jhpoelen]

see hurlbertlab/dietdatabase#41 (comment)

from https://travis-ci.org/hurlbertlab/dietdatabase/builds/193589175 -

[...]
2017-01-20 01:42:07,422 [main] WARN  org.eol.globi.tool.GitHubRepoCheck - [hurlbertlab/dietdatabase]: [not setting collection date, because [1987] on line [4] could not be read as date.]
2017-01-20 01:42:07,425 [main] WARN  org.eol.globi.tool.GitHubRepoCheck - [hurlbertlab/dietdatabase]: [not setting collection date, because [1987] on line [5] could not be read as date.]
[...]
2017-01-20 01:42:07,450 [main] WARN  org.eol.globi.data.StudyImporterForHurlbert - missing source on line [44]
2017-01-20 01:42:07,450 [main] WARN  org.eol.globi.data.StudyImporterForHurlbert - missing source on line [45]
[...]

[jhpoelen]

@ahhurlbert I made a pass at fixing it. Next time a chance occurs to your repository, the new checker should be used by travis. Please re-open/comment if you continue to see any unexpected warnings / failures in the travis log.