sensors/zones: place in namespace and cleanup

Signed-off-by: Patrick Venture <venture@google.com>
Change-Id: I527dbc8477a232945f696227a7b0b2adbee45175
diff --git a/test/dbus_active_unittest.cpp b/test/dbus_active_unittest.cpp
index 142cc1a..054ad1d 100644
--- a/test/dbus_active_unittest.cpp
+++ b/test/dbus_active_unittest.cpp
@@ -8,6 +8,11 @@
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 
+namespace pid_control
+{
+namespace
+{
+
 using ::testing::_;
 using ::testing::Invoke;
 using ::testing::NotNull;
@@ -52,3 +57,6 @@
 
 // WARN: getProperties will raise an exception on failure
 // Instead of just not updating the value.
+
+} // namespace
+} // namespace pid_control