Handle <useDefaultManifestFile>true</useDefaultManifestFile> correctly#7

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erwint wants to merge 3 commits intotesla:masterfrom GEBIT:useDefaultManifestFile

+133-67

Commits on Dec 9, 2016

generate META-INF/MANIFEST.MF if useDefaultManifestFile is set
Erwin Tratar
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Commits on Dec 12, 2017

Optimized refresh (no whole output dir!)
Erwin Tratar
committed

Commits on Jul 7, 2018

Do not trigger refresh if nothing done
Erwin Tratar
committed