Fix get_x_accel uri for absolute paths

[varmar05]

Fix rewrite for x_accel_uri when absolute path is sent in argument. This is useful when PROJECTS_ARCHIVES_DIR is mounted to separate folder, different than local projects.

[coveralls]

Pull Request Test Coverage Report for Build 14989518678

Details

• 3 of 3 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.003%) to 91.647%

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Totals
Change from base Build 14969733599:	0.003%
Covered Lines:	6956
Relevant Lines:	7590

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💛 - Coveralls