LP1858344 Make curl follow redirects to retrieve lib/json-20160810.jar

LP1858344 Make curl follow redirects to retrieve lib/json-20160810.jar

Maven redirects some requests to other servers, but unless curl is told
to follow redirects using the -L/--location flag, it will simply
download the HTML response for the HTTP 301 "Moved permanently" message,
breaking the ability to compile Hatch.

This commit adds the "-L" flag to the curl request for
lib/json-20160810.jar, resolving the issue.

Signed-off-by: Dan Scott <dan@coffeecode.net>
Signed-off-by: Bill Erickson <berickxx@gmail.com>