openssl: merge test fixes from upstream, part 2

This is a combined patch of the following two commits in maint:

	a09d8c78dd30 test/test_ssl: suppress warning in test_alpn_protocol_selection_cancel
	de965374ee85 test/test_pair: disable compression

This hopefully fixes the RubyCI gentoo failure:

	http://rubyci.s3.amazonaws.com/gentoo/ruby-trunk/log/20170912T033004Z.fail.html.gz

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59857 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/openssl/test_pair.rb

@@ -24,6 +24,7 @@ module OpenSSL::SSLPairM
       sctx.cert = @svr_cert
       sctx.key = @svr_key
       sctx.tmp_dh_callback = proc { OpenSSL::TestUtils::Fixtures.pkey_dh("dh1024") }
+      sctx.options |= OpenSSL::SSL::OP_NO_COMPRESSION
       ssls = OpenSSL::SSL::SSLServer.new(tcps, sctx)
       ns = ssls.accept
       ssls.close

test/openssl/test_ssl.rb

@@ -1015,6 +1015,7 @@ if openssl?(1, 0, 2) || libressl?
     ctx1 = OpenSSL::SSL::SSLContext.new
     ctx1.cert = @svr_cert
     ctx1.key = @svr_key
+    ctx1.tmp_dh_callback = proc { Fixtures.pkey_dh("dh1024") }
     ctx1.alpn_select_cb = -> (protocols) { nil }
     ssl1 = OpenSSL::SSL::SSLSocket.new(sock1, ctx1)