Increase sleep interval in the bootstrap script

Because the current timeout interval is too short in some environments.
The change also adds information messages to bootstrap scripts

Change-Id: I295da792349f5864a484e3eb318342dcc31fffab

galera/files/bootstrap.sh

@@ -3,15 +3,19 @@
 service {{ service.service }} start
 
 counter=60
+retries=0
 
 while [ $counter -gt 0 ]
 do
   mysql -u {{ service.admin.user }} -p{{ service.admin.password }} -e"quit"
   if [[ $? -eq 0 ]]; then
+    echo "Sucessfully connected to the MySQL service ($retries retries)."
     exit 0
   fi
-  counter=$(( $counter - 1 ))
-  sleep 2
+  counter=$(( counter - 1 ))
+  retries=$(( retries + 1 ))
+  sleep 4
 done
 
+echo "Failed to connect to the MySQL service after $retries retries."
 exit 1

galera/files/init_bootstrap.sh

@@ -3,15 +3,19 @@
 service {{ service.service }} start
 
 counter=60
+retries=0
 
 while [ $counter -gt 0 ]
 do
   mysql -u root -e"quit"
   if [[ $? -eq 0 ]]; then
+    echo "Sucessfully connected to the MySQL service ($retries retries)."
     exit 0
   fi
-  counter=$(( $counter - 1 ))
+  counter=$(( counter - 1 ))
+  retries=$(( retries + 1 ))
   sleep 2
 done
 
+echo "Failed to connect to the MySQL service after $retries retries."
 exit 1