SOFTHSM-76: Do not support RSA keys < 1024 bit
SOFTHSM-76: Test that we cannot generate RSA keys with key size less than 1024.
SOFTHSM-76: Update the news
SOFTHSM-76: Revert changes to OpenSSL.
We only limit key generation for Botan.
Also remove the 1023 bit key test.
Merge pull request #57 from bellgrim/SOFTHSM-76

SOFTHSM-76: Do not allow RSA < 1024 bits