F #6029: Normalize exit codes for rsync backup actions (#2535)

Possible fix for "Message received: BACKUP SUCCESS 96 -" (?)

src/datastore_mad/remotes/rsync/backup

@@ -91,7 +91,7 @@ begin
     ds = TransferManager::Datastore.new(:ds_xml => ds_xml)
 rescue StandardError => e
     STDERR.puts e.message
-    exit(1)
+    exit(-1)
 end
 
 path = Pathname.new(base).cleanpath.to_s
@@ -139,4 +139,6 @@ if rc.code != 0 || rc.stdout.empty?
     exit(-1)
 end
 
-puts "#{backup_id} #{rc.stdout.split[0]}"
+STDOUT.puts "#{backup_id} #{rc.stdout.split[0]}"
+
+exit(0)

src/datastore_mad/remotes/rsync/stat

@@ -82,7 +82,7 @@ begin
 
     if !diskid
         STDERR.puts "Wrong format for disk filename #{parts[2]}"
-        exit(1)
+        exit(-1)
     end
 
     last_snap = parts[1].split(',')[-1].split(':')[-1]
@@ -90,7 +90,7 @@ begin
     cmd = "cat #{base_path}#{last_snap}/vm.xml"
 rescue StandardError => e
     STDERR.puts e.message
-    exit(1)
+    exit(-1)
 end
 
 rc = TransferManager::Action.ssh('gather_vm_xml',
@@ -102,7 +102,7 @@ rc = TransferManager::Action.ssh('gather_vm_xml',
 
 if rc.code != 0
     STDERR.puts rc.stderr
-    exit(1)
+    exit(-1)
 end
 
 vm = REXML::Document.new(Base64.decode64(rc.stdout)).root
@@ -113,16 +113,16 @@ disk  = vm.elements[xpath]
 
 if !disk
     STDERR.puts "Cannot find disk #{diskid[1]} in VM backup info"
-    exit(1)
+    exit(-1)
 end
 
 size = disk.elements['//SIZE']
 
 if !size
     STDERR.puts "Cannot find size for disk  #{diskid[1]} in VM backup info"
-    exit(1)
+    exit(-1)
 end
 
-puts size.text
+STDOUT.puts size.text
 
-exit 0
+exit(0)