Add test hook to Reboot BMC page

Adds data attribute test hook to single reboot button on page

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: I82b64c69472e31efc866a0c4f10699fe38369694
diff --git a/src/views/Control/RebootBmc/RebootBmc.vue b/src/views/Control/RebootBmc/RebootBmc.vue
index 1291253..dbe1762 100644
--- a/src/views/Control/RebootBmc/RebootBmc.vue
+++ b/src/views/Control/RebootBmc/RebootBmc.vue
@@ -5,7 +5,12 @@
       <b-col md="8" lg="8" xl="6">
         <page-section>
           {{ $t('pageRebootBmc.rebootInformation') }}
-          <b-button variant="primary" class="d-block mt-5" @click="onClick">
+          <b-button
+            variant="primary"
+            class="d-block mt-5"
+            data-test-id="rebootBmc-button-reboot"
+            @click="onClick"
+          >
             {{ $t('pageRebootBmc.rebootBmc') }}
           </b-button>
         </page-section>