Handle Qual DBs based on default board name.

mod_for_factory_scripts/500copyQualDb

Index: mod_for_factory_scripts/500copyQualDb
diff --git a/mod_for_factory_scripts/500copyQualDb b/mod_for_factory_scripts/500copyQualDb
index cb89b3db71ab952b3f2e54f4568bdafdccca5a03..778d8dc600a3cbf5de2d722fb299ba33536f1a5d 100755
--- a/mod_for_factory_scripts/500copyQualDb
+++ b/mod_for_factory_scripts/500copyQualDb
@@ -6,15 +6,24 @@
 
 TEST_DIR="${ROOT_FS_DIR}/usr/local/autotest/site_tests/hardware_Components"
 
-# If QUALDB not specified, use the one based on board name.
-if [ -z ${QUALDB} ]; then
-  QUALDB="${TEST_DIR}/qualified_components_${BOARD}*"
-fi
+pushd ${TEST_DIR} 1> /dev/null
 
-if [ ! -z ${QUALDB} ] && [ -f ${QUALDB} ]; then
-  # Copy the qualified component file to the image
+if [ -z ${QUALDB} ]; then
+  # If QUALDB not specified, check the existence of the qualified components
+  # belonging to the board.
+  QUALDB="qualified_components_${BOARD}*"
+  FIRST_QUALDB=$(ls $QUALDB | head -1)
+  if [ ! -z ${FIRST_QUALDB} ]; then
+    # Remove qualified components belonging to other boards
+    ls qualified_components* | grep -v qualified_components_${BOARD} \
+      | xargs rm -f
+  else
+    echo "No qualified component file found at: ${QUALDB}"
+  fi
+else
+  rm -f qualified_components*
   echo "Copying ${QUALDB} to the image."
   cp -f ${QUALDB} ${TEST_DIR}/
-else
-  echo "No qualified component file found at: ${QUALDB}"
 fi
+
+popd 1> /dev/null