EX-2439 build: Add opa-src option to lbuild

EX-2439 build: Add opa-src option to lbuild

Create an option to pass in the opa tarball directly,
since we can not download directly from Intel site
anymore

Test-Parameters: trivial

Lustre-change: https://review.whamcloud.com/41334
Lustre-commit: 3a1a94db3c84c94ad99b8437f482aebfeb6b6246

Change-Id: I3fcad6ee7eff35d26ad7659b6148b0df67c48ad0
Signed-off-by: Minh Diep <mdiep@whamcloud.com>
Reviewed-by: Jian Yu <yujian@whamcloud.com>
Reviewed-by: James Nunez <jnunez@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/41749
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Andreas Dilger <adilger@whamcloud.com>