RFR: 88: git token store https://github.com does not work

[Stefan Johansson via github.com]

Hi, 

Please review this fix to avoid getting exceptions when having URIs with empty paths. Instead of assuming a leading '/' we now check the path in GitCredentials.fill and only removes a leading '/' if it is present.

Basic tests pass, but the affected commands have not yet been tested thoroughly.

Thanks,
Stefan

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Commits:
 - 8903663b:	88: git token store https://github.com does not work

Pull request:
https://git.openjdk.java.net/skara/pull/103

Webrev:
https://webrevs.openjdk.java.net/skara/103/webrev.00

Patch:
https://git.openjdk.java.net/skara/pull/103.diff

Fetch command:
git fetch https://git.openjdk.java.net/skara pull/103/head:pull/103