Update notes for submitted changes

* Config: Add helper method to check for empty value
* ErrorProne: Increase severity of FutureReturnValueIgnored to ERROR
* FS_Win32: Add missing parentheses on if-blocks
* Upgrade spotbugs to 3.1.12

44/81beae6399de618c5cbbef9a844a03cfbf22eb

@@ -0,0 +1,7 @@
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Verified+1: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Tue, 11 Jun 2019 05:45:57 -0400
+Reviewed-on: https://git.eclipse.org/r/143652
+Project: jgit/jgit
+Branch: refs/heads/master

51/8dc8638073a8371b4d5d77c265d70f96d62ff1

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Tue, 11 Jun 2019 05:45:57 -0400
+Reviewed-on: https://git.eclipse.org/r/143576
+Project: jgit/jgit
+Branch: refs/heads/master

8b/d0ba0f150feb485295f8c3890648eddf05fa41

@@ -0,0 +1,7 @@
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Verified+1: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Tue, 11 Jun 2019 05:45:57 -0400
+Reviewed-on: https://git.eclipse.org/r/143577
+Project: jgit/jgit
+Branch: refs/heads/master

fd/8d779b5eec614d2cb5a611f2e36f522b34a439

@@ -0,0 +1,7 @@
+Verified+1: JGit Bot <jgit-bot@eclipse.org>
+Code-Review+2: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-by: Matthias Sohn <matthias.sohn@sap.com>
+Submitted-at: Tue, 11 Jun 2019 05:45:57 -0400
+Reviewed-on: https://git.eclipse.org/r/143575
+Project: jgit/jgit
+Branch: refs/heads/master