Add tokio/rt to required features for async tests

Also add the full test command to ct.sh (without it, tests execute)

Author: zugzwang

ct.sh

@@ -22,6 +22,8 @@ if [ $TRAVIS_RUST_VERSION = "stable" ] || [ $TRAVIS_RUST_VERSION = "beta" ] || [
     cargo test --features pkcs12_rc2
     cargo test --features force_aesni_support
     cargo test --features dsa
+    # without these, tests marked with tokio::test do not run, but report OK.
+    cargo test --features=std,threading,tokio,tokio/net,tokio/io-util,tokio/macros,tokio/rt
 
 elif [ $TRAVIS_RUST_VERSION = $CORE_IO_NIGHTLY ]; then
     cargo +$CORE_IO_NIGHTLY test --no-default-features --features core_io,rdrand,time,custom_time,custom_gmtime_r

mbedtls/Cargo.toml

@@ -92,7 +92,7 @@ required-features = ["std"]
 [[test]]
 name = "async_session"
 path = "tests/async_session.rs"
-required-features = ["std", "threading", "tokio", "tokio/net", "tokio/io-util", "tokio/macros"]
+required-features = ["std", "threading", "tokio", "tokio/net", "tokio/io-util", "tokio/macros", "tokio/rt"]
 
 [[test]]
 name = "client_server"