Re-vendor queue-worker publisher for reconnect

- re-vendor queue-worker for publisher via 0.6.0
- bump queue-worker version to 0.6.0 in docker-compose.yml for
AMD64
- use new naming for NATS of nats -> NATS in variables where
required
- add default reconnect of 60 times, 2 seconds apart.

Signed-off-by: Alex Ellis (VMware) <alexellis2@gmail.com>

gateway/vendor/github.com/openfaas/nats-queue-worker/readconfig_test.go

@@ -0,0 +1,96 @@
+package main
+
+import (
+	"os"
+	"testing"
+	"time"
+)
+
+func Test_ReadConfig(t *testing.T) {
+
+	readConfig := ReadConfig{}
+
+	os.Setenv("faas_nats_address", "test_nats")
+	os.Setenv("faas_gateway_address", "test_gatewayaddr")
+	os.Setenv("faas_function_suffix", "test_suffix")
+	os.Setenv("faas_print_body", "true")
+	os.Setenv("write_debug", "true")
+	os.Setenv("max_inflight", "10")
+	os.Setenv("ack_wait", "10ms")
+
+	config := readConfig.Read()
+
+	expected := "test_nats"
+	if config.NatsAddress != expected {
+		t.Logf("Expected NatsAddress `%s` actual `%s`\n", expected, config.NatsAddress)
+		t.Fail()
+	}
+
+	expected = "test_gatewayaddr"
+	if config.GatewayAddress != expected {
+		t.Logf("Expected GatewayAddress `%s` actual `%s`\n", expected, config.GatewayAddress)
+		t.Fail()
+	}
+
+	expected = "test_suffix"
+	if config.FunctionSuffix != expected {
+		t.Logf("Expected FunctionSuffix `%s` actual `%s`\n", expected, config.FunctionSuffix)
+		t.Fail()
+	}
+
+	if config.DebugPrintBody != true {
+		t.Logf("Expected DebugPrintBody `%v` actual `%v`\n", true, config.DebugPrintBody)
+		t.Fail()
+	}
+
+	if config.WriteDebug != true {
+		t.Logf("Expected WriteDebug `%v` actual `%v`\n", true, config.WriteDebug)
+		t.Fail()
+	}
+
+	expectedMaxInflight := 10
+	if config.MaxInflight != expectedMaxInflight {
+		t.Logf("Expected maxInflight `%v` actual `%v`\n", expectedMaxInflight, config.MaxInflight)
+		t.Fail()
+	}
+
+	expectedAckWait := time.Millisecond * 10
+	if config.AckWait != expectedAckWait {
+		t.Logf("Expected maxInflight `%v` actual `%v`\n", expectedAckWait, config.AckWait)
+		t.Fail()
+	}
+
+	os.Unsetenv("max_inflight")
+	os.Unsetenv("ack_wait")
+
+	config = readConfig.Read()
+
+	expectedMaxInflight = 1
+	if config.MaxInflight != expectedMaxInflight {
+		t.Logf("Expected maxInflight `%v` actual `%v`\n", expectedMaxInflight, config.MaxInflight)
+		t.Fail()
+	}
+
+	expectedAckWait = time.Second * 30
+	if config.AckWait != expectedAckWait {
+		t.Logf("Expected maxInflight `%v` actual `%v`\n", expectedAckWait, config.AckWait)
+		t.Fail()
+	}
+
+	os.Setenv("max_inflight", "10.00")
+	os.Setenv("ack_wait", "10")
+
+	config = readConfig.Read()
+
+	expectedMaxInflight = 1
+	if config.MaxInflight != expectedMaxInflight {
+		t.Logf("Expected maxInflight `%v` actual `%v`\n", expectedMaxInflight, config.MaxInflight)
+		t.Fail()
+	}
+
+	expectedAckWait = time.Second * 30
+	if config.AckWait != expectedAckWait {
+		t.Logf("Expected ackWait `%v` actual `%v`\n", expectedAckWait, config.AckWait)
+		t.Fail()
+	}
+}