test: refactor all tests that depends on crypto

we had a few ways versions of looking for support before executing a test. this
commit unifies them as well as add the check for all tests that previously
lacked them. found by running `./configure --without-ssl && make test`. also,
produce tap skip output if the test is skipped.

PR-URL: https://github.com/iojs/io.js/pull/1049
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Shigeki Ohtsu <ohtsu@iij.ad.jp>

test/parallel/test-https-byteswritten.js

@@ -1,12 +1,12 @@
-if (!process.versions.openssl) {
-  console.error('Skipping because node compiled without OpenSSL.');
-  process.exit(0);
-}
-
 var common = require('../common');
 var assert = require('assert');
 var fs = require('fs');
 var http = require('http');
+
+if (!common.hasCrypto) {
+  console.log('1..0 # Skipped: missing crypto');
+  process.exit();
+}
 var https = require('https');
 
 var options = {