Unify errors treating from OpenSSL functions.

Unify errors treating from OpenSSL functions.

Have 3 lines block almost everywhere where we call OpenSSL function
and want to handle its error code. Always ERROR_DUMP in such a case.

Also some other unification of OpenSSL returns where we don't care
about its errors (loading keys where errors are expected due to
autodetection).

Change-Id: Ie9e2f19bae099cfaddaa9c45a6de985f09b3f97b