Added getCreationTime(Path) to KfsAccess

[kstinsonqc]

Adds getCreationTime method to KfsAccess.

@mikeov @mckurt @zimmix

[mikeov]

I think that it would make more sense to fix KfsFileAttr and stat(), by ensuring that java KfsFileAttr has all fields that the c++ equivalent has, use stat() call, and deprecate all accessor methods that fetch single fields of file attribute, rather than creating a new one.

[mikeov]

Also please change KfsClientImpl::ReadDirectory() / DirectoryIterator() / kfs_readdirplus() to pass all fields while you're on this.

[mikeov]

And for file attributes report chunkCount()

[codecov-io]

Codecov Report

Merging #214 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #214   +/-   ##
======================================
  Coverage    75.1%   75.1%           
======================================
  Files           8       8           
  Lines         245     245           
  Branches       31      31           
======================================
  Hits          184     184           
  Misses         42      42           
  Partials       19      19

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[kstinsonqc]

PR update to undo the addition of getCreationTime() in favor of exposing more of the client's KfsFileAttr files to KfsAccess's version.