NB-23 patches compitable with Java source version 1.8 (#232)

Author: Achal1607

build.xml

@@ -41,10 +41,9 @@
             patches/7370.diff
             patches/7382.diff
             patches/7491-preliminary.diff
-            patches/7543.diff
-            patches/7548.diff
-            patches/7621.diff
-            patches/7583.diff
+            patches/7548_source-1.8.diff
+            patches/7583_source-1.8.diff
+            patches/7621.diff 
             patches/mvn-sh.diff
             patches/generate-dependencies.diff
             patches/rename-debugger.diff