Capture *.failure logs from $BASE/status/stack

When a service fails to start properly the output is dumped in
*.failure files, however devstack-gate wasn't archiving them so it
made identifying the causes of certain failures difficult to debug.
This commit addresses that by copying these logs too.

Change-Id: Icbb5188c09938811d0566a869a26a22502520df2

functions.sh

@@ -472,6 +472,12 @@ function cleanup_host {
     # logs files we don't want to keep
     sudo rm $BASE/logs/grenade.sh.log.*
 
+    # Copy failure files if they exist
+    if [ $(ls $BASE/stack/status/*.failure | wc -l) -gt 0 ]; then
+        sudo mkdir -p $BASE/logs/status
+        sudo cp $BASE/status/stack/*.failure $BASE/logs/status/
+    fi
+
     # Copy tempest config file
     sudo cp $BASE/new/tempest/etc/tempest.conf $NEWLOGTARGET/tempest_conf.txt
 
@@ -526,6 +532,11 @@ function cleanup_host {
         sudo mv $f ${f/.log/.txt}
     done
 
+    #rename all failure files to have .txt
+    for f in $(find $BASE/logs/status -name "*.failure"); do
+        sudo mv $f ${f/.failure/.txt}
+    done
+
     # append .txt to all config files
     # (there are some /etc/swift .builder and .ring files that get
     # caught up which aren't really text, don't worry about that)