Parameterize polling retry count and wait period

test/e2e/lib/poll.bash

@@ -4,18 +4,22 @@ function poll_until_equals() {
   local what="$1"
   local expected="$2"
   local check_cmd="$3"
-  poll_until_true "$what" "[ '$expected' = \"\$( $check_cmd )\" ]"
+  local retries="$4"
+  local wait_period="$5"
+  poll_until_true "$what" "[ '$expected' = \"\$( $check_cmd )\" ]" "$retries" "$wait_period"
 }
 
 function poll_until_true() {
   local what="$1"
   local check_cmd="$2"
+  # timeout after $retries * $wait_period seconds
+  local retries=${3:-24}
+  local wait_period=${4:-5}
   echo -n ">>> Waiting for $what " >&3
-  retries=24
   count=0
   until eval "$check_cmd"; do
     echo -n '.' >&3
-    sleep 5
+    sleep $wait_period
     count=$(($count + 1))
     if [[ ${count} -eq ${retries} ]]; then
       echo ' No more retries left!' >&3