Add x86 infrastruction for boot test

Changes:
  - Add platform type user driven option "x86". by default it will
    choose platform "power"
  - Add filter to removed x86 non supported states from state.py
  - Remove "operating_systems" entry from data/boot_table_x86.json

How To test:
  robot -v OPENBMC_HOST:xx.xx.xx.xx -v PLATFORM_ARCH_TYPE:x86  <test suite>

Change-Id: Id49b07e620150e4ed0c4fa45675959f647f4f878
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/resource.robot b/lib/resource.robot
index 4aa1a09..401cbe9 100755
--- a/lib/resource.robot
+++ b/lib/resource.robot
@@ -7,6 +7,9 @@
 
 *** Variables ***
 
+# By default power, support x86 as well.
+${PLATFORM_ARCH_TYPE}             power
+
 # Transition REST vs Redfish ONLY temporary changes for stagging
 # automation infrastructure change and for continuity.
 ${REDFISH_SUPPORT_TRANS_STATE}    ${0}