Support new version of openssl

1. Support new version of openssl >= 1.1.1.
2. Add a blank line between digest and signature section per spec
SOL004.

Issue-ID: VNFSDK-519

Change-Id: I92873897805ab627a31eb5c09450e33b2f091db5
Signed-off-by: Lianhao Lu <lianhao.lu@intel.com>
2 files changed