Java: Add up/downgrade scripts

Author: igfoo

java/downgrades/376ce7dad79375c0772b8edb938da82ca5271ba1/old.dbscheme

@@ -0,0 +1,11 @@
+class TypeVariable extends @typevariable {
+  string toString() { none() }
+}
+
+class ClassOrInterfaceOrCallable extends @classorinterfaceorcallable {
+  string toString() { none() }
+}
+
+from TypeVariable id, string nodeName, int pos, ClassOrInterfaceOrCallable parentid
+where typeVars(id, nodeName, pos, parentid)
+select id, nodeName, pos, 0, parentid

java/downgrades/376ce7dad79375c0772b8edb938da82ca5271ba1/semmlecode.dbscheme

@@ -0,0 +1,3 @@
+description: Remove deprecated entries
+compatibility: partial
+typeVars.rel: run typeVars.qlo