Merge pull request #2110 from nabinhait/hotfix

minor fix in sales invoice test records
Enqueue Newsletter sending in Longjob Queue
Merge pull request #2112 from anandpdoshi/anand-august-27

Enqueue Newsletter sending in Longjob Queue
[fix] get future vouchers query
Merge pull request #2117 from anandpdoshi/anand-august-27

[fix] get future vouchers query
Minor fix in maintenance schedule
Rounding issue fixed for bom quantity