[macOS] Fail builds on errors during the image generation (#1756)

* set -e and fix all the scripts

* add source utils to finalize_vm script

* change xcode version in postbuild script

* fix for softwareupdates and for xcode version

images/macos/provision/core/postgresql.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/bash -e -o pipefail
 
 #Install latest version of postgresql
 brew install postgres
@@ -6,13 +6,21 @@ brew install postgres
 #Service postgresql should be started before use.
 brew services start postgresql
 
-#Verify that PostgreSQL is ready for accept incoming connections.
-# exit codes:
-# ready - 0
-# reject - 1
-# connection timeout - 2
-# incorrect credentials or parameters - 3
-pg_isready
+#Verify PostgreSQL is ready for accept incoming connections
+echo "Check PostgreSQL service is running"
+i=10
+COMMAND='pg_isready'
+while [ $i -gt 0 ]; do
+    echo "Check PostgreSQL service status"
+    eval $COMMAND && break
+    ((i--))
+    if [ $i == 0 ]; then
+        echo "PostgreSQL service not ready, all attempts exhausted"
+        exit 1
+    fi
+    echo "PostgreSQL service not ready, wait 10 more sec, attempts left: $i"
+    sleep 10
+done
 
 #Stop postgresql
 brew services stop postgresql