Add updated table styles

  - Refer below link for styles:
      https://ibm.invisionapp.com/share/D8O06PPE32B#/screens

Signed-off-by: Sukanya Pandey <sukapan1@in.ibm.com>
Change-Id: I6dcc3b8d0fb7ef19388b5bfeaf87fce78725b638
diff --git a/src/views/AccessControl/LocalUserManagement/TableRoles.vue b/src/views/AccessControl/LocalUserManagement/TableRoles.vue
index 6596c50..b4b366a 100644
--- a/src/views/AccessControl/LocalUserManagement/TableRoles.vue
+++ b/src/views/AccessControl/LocalUserManagement/TableRoles.vue
@@ -1,5 +1,5 @@
 <template>
-  <b-table stacked="sm" small :items="items" :fields="fields">
+  <b-table stacked="sm" hover small :items="items" :fields="fields">
     <template v-slot:cell(administrator)="data">
       <template v-if="data.value">
         <checkmark20 />