[Bug 449211] Provide API for a common captcha via eclipse.org-common

Change-Id: I639f87381d7134b0ed07be084c0f19b0ef0af20f
Signed-off-by: Christopher Guindon <chris.guindon@eclipse.org>
update api key file path

Signed-off-by: Christopher Guindon <chris.guindon@eclipse.org>