Bug#21868 Server crashes if encrypted certificate key provided

 - Add test case which runs the same tests as ssl.test but with a different DES encrypted key 

mysql-test/std_data/server-cert-des.pem

+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

mysql-test/std_data/server-key-des.pem

+-----BEGIN RSA PRIVATE KEY-----
+Proc-Type: 4,ENCRYPTED
+DEK-Info: DES-EDE3-CBC,D2BE7598C7E3BDA5
+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+-----END RSA PRIVATE KEY-----

mysql-test/t/ssl_des-master.opt

+--ssl-cert=std_data/server-cert-des.pem --ssl-key=std_data/server-key-des.pem

mysql-test/t/ssl_des.test

+# Tell the server to use a DES-encrypted cert
+# then turn on ssl between the client and server
+# and run a number of standard tests
+
+-- source include/have_openssl.inc
+
+# Connect by ip to avoid turning on "ssl-verify-server-cert"
+connect (ssl_con,127.0.0.1,root,,,,$MASTER_MYPORT,SSL);
+
+# Check ssl turned on
+SHOW STATUS LIKE 'Ssl_cipher';
+
+# Source select test case
+-- source include/common-tests.inc
+
+# Check ssl turned on
+SHOW STATUS LIKE 'Ssl_cipher';
+
+