Fix tag syntax and spellings

Changes:
    - Tag mismatch fix
    - typo fixes

Tested: - NA
Change-Id: Ie90788fda83dff6c7867a924163ee1ab50f0916a
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/openpower/ext_interfaces/test_vmi.robot b/openpower/ext_interfaces/test_vmi.robot
index 9591706..d701082 100644
--- a/openpower/ext_interfaces/test_vmi.robot
+++ b/openpower/ext_interfaces/test_vmi.robot
@@ -575,9 +575,9 @@
 
 
 Disable VMI DHCPv6 Property And Verify
-    [Documentation]  Disable VMI DHCPv6 property and verify IPv6 address origin is set to
-    ...  static and DHCPv6 address is erased.
-    [Tags]  Disable_VMI_DHCPv6_And_Verify
+    [Documentation]  Disable VMI DHCPv6 property and verify IPv6 address
+    ...              origin is set to static and DHCPv6 address is erased.
+    [Tags]  Disable_VMI_DHCPv6_Property_And_Verify
     [Setup]  Set VMI DHCPv6 Property  Enabled
 
     Set VMI DHCPv6 Property  Disabled