fix: swift statistics return format
rm: dict lookup

Explicitly typecast required swift headers to int
FileSize required for Finalize File. ContentLength added to assertHeaders
Merge branch 'master' into finalize_files
Delete missing vault, block, file
X-File-Length sent in header
pep8
fix: catch KeyError Exceptions
Merge branch 'master' into finalize_files
Merge pull request #120 from TheSriram/fix_swift_headers_return

fix: swift statistics return format
Merge pull request #131 from jc7998/finalize_files

Tests: Modify finalize file with new X-File-Length header
Merge pull request #130 from jc7998/delete

Delete missing vault, block, file