Adding delta for getTime assert to fix #578

[magicDGS]

Description

After overhaul the tests in RelativeIso8601DateTest because of test failures due to #578, I found that some of the getTime() asserts does not contain a delta value when one of them does. Thus, I added a delta value for all the tests to try to solve this issue.

Because the test failure is not deterministic, I don't know how to tests this. But at least it is a good practice to test always with the same delta value. This is a very simple patch that does not change anything important in the code.

Checklist

• Code compiles correctly
• New tests covering changes and new functionality
• All tests passing
• Extended the README / documentation, if necessary
• Is not backward compatible (breaks binary or source compatibility)

[coveralls]

Coverage remained the same at 68.995% when pulling ce371d3 on magicDGS:dgs_fix_578 into fbba536 on samtools:master.

[coveralls]

Coverage remained the same at 69.04% when pulling 34931c3 on magicDGS:dgs_fix_578 into 88b6719 on samtools:master.

[yfarjoun]

👍

[lbergelson]

thanks @magicDGS! (I was away on paternity leave, going to get to your long delayed PR's in the near future)