Make sure the d-g hooks end up in reproduce.sh

Currently we don't have any handling for devstack-gate hooks in the
reproduce.sh script so jobs that rely on them don't generate accurate
reproduce.sh scripts. Fix this by explicitly adding each of the three
hooks to the reproduce.sh script if they are defined.

Change-Id: Iae6191dfc2dab81e7ca172762728ede2946f5f62

functions.sh

@@ -203,6 +203,11 @@ EOF
     if [ -n "$JOB_PROJECTS" ] ; then
         echo "declare -x PROJECTS=\"$JOB_PROJECTS\"" >> $WORKSPACE/logs/reproduce.sh
     fi
+    for fun in pre_test_hook gate_hook post_test_hook ; do
+        if function_exists $fun ; then
+            declare -fp $fun >> $WORKSPACE/logs/reproduce.sh
+        fi
+    done
 
     cat >> $WORKSPACE/logs/reproduce.sh <<EOF
 

test-functions.sh

@@ -525,6 +525,11 @@ declare -x ZUUL_VAR_MULTILINE="zuul-var-setting1
 zuul-var-setting2"
 declare -x DEVSTACK_VAR_MULTILINE="devstack-var-setting1
 devstack-var-setting2"
+gate_hook ()
+{
+    echo "The cake is a lie"
+}
+declare -fx gate_hook
 EOF
 
     # prepare environment for test
@@ -535,6 +540,10 @@ devstack-var-setting2"
     export ZUUL_VAR=zuul-var
     export ZUUL_VAR_MULTILINE="zuul-var-setting1
 zuul-var-setting2"
+    function gate_hook {
+        echo "The cake is a lie"
+    }
+    export -f gate_hook
     JOB_NAME=test-job
     mkdir $WORKSPACE/logs
 
@@ -558,6 +567,7 @@ zuul-var-setting2"
     unset ZUUL_VAR
     unset ZUUL_VAR_MULTILINE
     unset JOB_NAME
+    unset gate_hook
 }
 
 # Run tests: