Fix forced Tags with legitimate tagOwners

Also replace loops contains

acls_test.go

@@ -1055,6 +1055,52 @@ func Test_expandAlias(t *testing.T) {
 			want:    []string{"100.64.0.1", "100.64.0.2"},
 			wantErr: false,
 		},
+		{
+			name: "Forced tag with legitimate tagOwner",
+			args: args{
+				alias: "tag:hr-webserver",
+				machines: []Machine{
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.1"),
+						},
+						Namespace:  Namespace{Name: "joe"},
+						ForcedTags: []string{"tag:hr-webserver"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.2"),
+						},
+						Namespace: Namespace{Name: "joe"},
+						HostInfo: HostInfo{
+							OS:          "centos",
+							Hostname:    "foo",
+							RequestTags: []string{"tag:hr-webserver"},
+						},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.3"),
+						},
+						Namespace: Namespace{Name: "marc"},
+					},
+					{
+						IPAddresses: MachineAddresses{
+							netaddr.MustParseIP("100.64.0.4"),
+						},
+						Namespace: Namespace{Name: "mickael"},
+					},
+				},
+				aclPolicy: ACLPolicy{
+					TagOwners: TagOwners{
+						"tag:hr-webserver": []string{"joe"},
+					},
+				},
+				stripEmailDomain: true,
+			},
+			want:    []string{"100.64.0.1", "100.64.0.2"},
+			wantErr: false,
+		},
 		{
 			name: "list host in namespace without correctly tagged servers",
 			args: args{