Compute Acceptance Test Changes (#33)

This commit makes more changes to the compute acceptance tests:

* Makes all reusable functions exportable so other APIs can use them.
* Centralizes client initialization and environment variable checks.
diff --git a/acceptance/openstack/compute/v2/network_test.go b/acceptance/openstack/compute/v2/network_test.go
index c7ff1a3..38a6d54 100644
--- a/acceptance/openstack/compute/v2/network_test.go
+++ b/acceptance/openstack/compute/v2/network_test.go
@@ -3,15 +3,14 @@
 package v2
 
 import (
-	"fmt"
 	"testing"
 
-	"github.com/gophercloud/gophercloud"
+	"github.com/gophercloud/gophercloud/acceptance/clients"
 	"github.com/gophercloud/gophercloud/openstack/compute/v2/extensions/networks"
 )
 
 func TestNetworksList(t *testing.T) {
-	client, err := newClient()
+	client, err := clients.NewComputeV2Client()
 	if err != nil {
 		t.Fatalf("Unable to create a compute client: %v", err)
 	}
@@ -27,22 +26,22 @@
 	}
 
 	for _, network := range allNetworks {
-		printNetwork(t, &network)
+		PrintNetwork(t, &network)
 	}
 }
 
 func TestNetworksGet(t *testing.T) {
-	choices, err := ComputeChoicesFromEnv()
+	choices, err := clients.AcceptanceTestChoicesFromEnv()
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	client, err := newClient()
+	client, err := clients.NewComputeV2Client()
 	if err != nil {
 		t.Fatalf("Unable to create a compute client: %v", err)
 	}
 
-	networkID, err := getNetworkIDFromNetworks(t, client, choices.NetworkName)
+	networkID, err := GetNetworkIDFromNetworks(t, client, choices.NetworkName)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -52,80 +51,5 @@
 		t.Fatalf("Unable to get network %s: %v", networkID, err)
 	}
 
-	printNetwork(t, network)
-}
-
-func getNetworkIDFromNetworkExtension(t *testing.T, client *gophercloud.ServiceClient, networkName string) (string, error) {
-	allPages, err := networks.List(client).AllPages()
-	if err != nil {
-		t.Fatalf("Unable to list networks: %v", err)
-	}
-
-	networkList, err := networks.ExtractNetworks(allPages)
-	if err != nil {
-		t.Fatalf("Unable to list networks: %v", err)
-	}
-
-	networkID := ""
-	for _, network := range networkList {
-		t.Logf("Network: %v", network)
-		if network.Label == networkName {
-			networkID = network.ID
-		}
-	}
-
-	t.Logf("Found network ID for %s: %s\n", networkName, networkID)
-
-	return networkID, nil
-}
-
-func getNetworkIDFromNetworks(t *testing.T, client *gophercloud.ServiceClient, networkName string) (string, error) {
-	allPages, err := networks.List(client).AllPages()
-	if err != nil {
-		t.Fatalf("Unable to list networks: %v", err)
-	}
-
-	allNetworks, err := networks.ExtractNetworks(allPages)
-	if err != nil {
-		t.Fatalf("Unable to list networks: %v", err)
-	}
-
-	for _, network := range allNetworks {
-		if network.Label == networkName {
-			return network.ID, nil
-		}
-	}
-
-	return "", fmt.Errorf("Failed to obtain network ID for network %s", networkName)
-}
-
-func printNetwork(t *testing.T, network *networks.Network) {
-	t.Logf("Bridge: %s", network.Bridge)
-	t.Logf("BridgeInterface: %s", network.BridgeInterface)
-	t.Logf("Broadcast: %s", network.Broadcast)
-	t.Logf("CIDR: %s", network.CIDR)
-	t.Logf("CIDRv6: %s", network.CIDRv6)
-	t.Logf("CreatedAt: %v", network.CreatedAt)
-	t.Logf("Deleted: %t", network.Deleted)
-	t.Logf("DeletedAt: %v", network.DeletedAt)
-	t.Logf("DHCPStart: %s", network.DHCPStart)
-	t.Logf("DNS1: %s", network.DNS1)
-	t.Logf("DNS2: %s", network.DNS2)
-	t.Logf("Gateway: %s", network.Gateway)
-	t.Logf("Gatewayv6: %s", network.Gatewayv6)
-	t.Logf("Host: %s", network.Host)
-	t.Logf("ID: %s", network.ID)
-	t.Logf("Injected: %t", network.Injected)
-	t.Logf("Label: %s", network.Label)
-	t.Logf("MultiHost: %t", network.MultiHost)
-	t.Logf("Netmask: %s", network.Netmask)
-	t.Logf("Netmaskv6: %s", network.Netmaskv6)
-	t.Logf("Priority: %d", network.Priority)
-	t.Logf("ProjectID: %s", network.ProjectID)
-	t.Logf("RXTXBase: %d", network.RXTXBase)
-	t.Logf("UpdatedAt: %v", network.UpdatedAt)
-	t.Logf("VLAN: %d", network.VLAN)
-	t.Logf("VPNPrivateAddress: %s", network.VPNPrivateAddress)
-	t.Logf("VPNPublicAddress: %s", network.VPNPublicAddress)
-	t.Logf("VPNPublicPort: %d", network.VPNPublicPort)
+	PrintNetwork(t, network)
 }