Correct the regex that strips ZIP entry to shortname

[janvanmansum]

What this PR does / why we need it:

Which issue(s) this PR closes:

Closes #

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Suggestions on how to test this:

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

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[coveralls]

Pull Request Test Coverage Report for Build #42

Details

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• 11889 unchanged lines in 108 files lost coverage.
• Overall coverage increased (+0.6%) to 20.716%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/main/java/edu/harvard/iq/dataverse/engine/command/impl/CreateNewDataFilesCommand.java	0	1	0.0%

Files with Coverage Reduction	New Missed Lines	%
src/main/java/edu/harvard/iq/dataverse/engine/command/impl/GetLatestPublishedDatasetVersionCommand.java	1	94.74%
src/main/java/edu/harvard/iq/dataverse/engine/command/impl/ReturnDatasetToAuthorCommand.java	2	92.59%
src/main/java/edu/harvard/iq/dataverse/engine/command/impl/DeletePidCommand.java	3	0.0%
src/main/java/edu/harvard/iq/dataverse/engine/command/impl/ReservePidCommand.java	3	0.0%
src/main/java/edu/harvard/iq/dataverse/engine/command/impl/AssignRoleCommand.java	4	76.0%
src/main/java/edu/harvard/iq/dataverse/settings/Setting.java	4	0.0%
src/main/java/edu/harvard/iq/dataverse/dataaccess/DataAccess.java	4	47.95%
src/main/java/edu/harvard/iq/dataverse/engine/command/impl/GetDraftFileMetadataIfAvailableCommand.java	4	0.0%
src/main/java/edu/harvard/iq/dataverse/engine/command/impl/GetLatestAccessibleDatasetVersionCommand.java	5	0.0%
src/main/java/edu/harvard/iq/dataverse/authorization/AuthFilter.java	6	0.0%

Totals
Change from base Build #37:	0.6%
Covered Lines:	17160
Relevant Lines:	82836

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💛 - Coveralls