Allure Report Serverlet throws exception on Windows

[bmsq]

AllureReportServlet.doGet() triggers a MalformedURLException resulting in a blank page when viewing the "Allure Report" tab in Bamboo.

AllureArtifactsManager.getLocalStorageURL() assumes that a file path can be converted to a URL using String.format("file://%s", fullPath) and fails to produce a valid URL on Windows. File.toURI().toURL() should be used instead.

AllureReportServlet.setResponseHeaders() also incorrectly handles conversions from fileUrl to a Path. Instead of using Paths.get(new URL(fileUrl).getPath)) which breaks on Windows, Paths.get(new URL(fileUrl).toURI()) can be used instead.

The URL/URI conversions introduce some ugly exceptions. I'll provide a PR with some rudimentary exception handling shortly.