[NGINX] OpenSSL version upgrade

[fntlnz]

The nginx.org ngx_http_v2_module page states:

Note that accepting HTTP/2 connections over TLS requires the “Application-Layer Protocol Negotiation” (ALPN) TLS extension support, which is available only since OpenSSL version 1.0.2. Using the “Next Protocol Negotiation” (NPN) TLS extension for this purpose (available since OpenSSL version 1.0.1) is not guaranteed.

Since the nginx dockerfile build also nginx 1.9.5 we have to upgrade OpenSSL to 1.0.2 from 1.0.1e which is the current version installed by yum