pacsign: hide confusing log message

The openssl hsm_manager looks for a list of possible
versions for libcrypto. Hide a misleading "failed" message
when one of the versions is not found by making it a debug
message rather than an warning message.

Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>

python/pacsign/pacsign/hsm_managers/openssl/openssl.py

@@ -297,7 +297,7 @@ def _find_openssl_so(self, versions):
             try:
                 dll = CDLL(link)
             except OSError:
-                log.warn('CDLL(%s) failed', link)
+                log.debug('CDLL(%s) failed', link)
                 continue
 
             if dll is None: