tweaked the error handler to be a regex match versus a strict text ma…

…tch.

Signed-off-by: nikhil2611 <[email protected]>

lib/berkshelf/ssl_policies.rb

@@ -16,7 +16,7 @@ def initialize
     def add_trusted_cert(cert)
       @store.add_cert(cert)
     rescue OpenSSL::X509::StoreError => e
-      raise e unless e.message == "cert already in hash table"
+      raise e unless e.message.match(/cert already in hash table/)
     end
 
     def trusted_certs_dir