Adding support for BMC Power On/BMC Power Off

This change includes the following new keywords:
  BMC Power On
  Check Power On States
  BMC Power Off
  Check Power Off States
  Get BMC State
  Get Power State

It also includes modifications to the following keywods:
  Is Power On
  Is Power Off
  Wait For Host To Ping
  Check OS
  Open Connection and Log In

A variable definition has been added to resource.txt and a
file to keep track of DVT's resource files has been created.

Change-Id: Idc81be7e2dfb21c35bc51214f8650a10d8481120
Signed-off-by: Leah McNutt <lmcnutt@us.ibm.com>
diff --git a/lib/boot/boot_resource_master.robot b/lib/boot/boot_resource_master.robot
new file mode 100644
index 0000000..1c8e85a
--- /dev/null
+++ b/lib/boot/boot_resource_master.robot
@@ -0,0 +1,5 @@
+*** Settings ***
+# This file pulls in all of the other resource files in lib/boot/
+
+Resource    powerons.robot
+Resource    poweroffs.robot