* stable-5.3:
Prepare 5.3.1-SNAPSHOT builds
JGit v5.3.0.201903130848-r
Prepare 5.1.7-SNAPSHOT builds
JGit v5.1.6.201903130242-r
Prepare 4.11.8-SNAPSHOT builds
JGit v4.11.7.201903122105-r
Prepare 4.9.10-SNAPSHOT builds
JGit v4.9.9.201903122025-r
Prepare 4.7.9-SNAPSHOT builds
JGit v4.7.8.201903121755-r
Prepare 4.5.7-SNAPSHOT builds
JGit v4.5.6.201903121547-r
Check for packfile validity and fd before reading
Move throw of PackInvalidException outside the catch
Use FileSnapshot to get lastModified on PackFile
Include size when comparing FileSnapshot
Do not reuse packfiles when changed on filesystem
Silence API warnings for new API introduced for fixes
Change-Id: Ief9f6a9e89c4a1ef122daedbfd933676393fab06
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>