Fixup tests from code review changes

Author: JLLeitschuh

java/ql/test/library-tests/constants/PrintAst.expected

@@ -518,11 +518,11 @@ constants/Values.java:
 #   90|             0: [VarAccess] var_field
 #   91|         68: [LocalVariableDeclStmt] var ...;
 #   91|           0: [TypeAccess] String
-#   91|           1: [LocalVariableDeclExpr] concatinatedString
+#   91|           1: [LocalVariableDeclExpr] concatenatedString
 #   91|             0: [StringLiteral] "a" + "b"
 #   92|         69: [LocalVariableDeclStmt] var ...;
 #   92|           0: [TypeAccess] String
-#   92|           1: [LocalVariableDeclExpr] concatinatedChar
+#   92|           1: [LocalVariableDeclExpr] concatenatedChar
 #   92|             0: [AddExpr] ... + ...
 #   92|               0: [StringLiteral] "ab"
 #   92|               1: [CharacterLiteral] 'c'

java/ql/test/library-tests/constants/getBooleanValue.ql

@@ -1,9 +1,9 @@
 import semmle.code.java.Variable
 
-from Variable v, Expr init, RefType enclosing, boolean constant
+from Variable v, CompileTimeConstantExpr init, RefType enclosing, boolean constant
 where
   v.getInitializer() = init and
   init.getEnclosingCallable().getDeclaringType() = enclosing and
   enclosing.hasQualifiedName("constants", "Values") and
-  constant = init.(CompileTimeConstantExpr).getBooleanValue()
+  constant = init.getBooleanValue()
 select init, constant

java/ql/test/library-tests/constants/getIntValue.ql

@@ -1,9 +1,9 @@
 import semmle.code.java.Variable
 
-from Variable v, Expr init, RefType enclosing, int constant
+from Variable v, CompileTimeConstantExpr init, RefType enclosing, int constant
 where
   v.getInitializer() = init and
   init.getEnclosingCallable().getDeclaringType() = enclosing and
   enclosing.hasQualifiedName("constants", "Values") and
-  constant = init.(CompileTimeConstantExpr).getIntValue()
+  constant = init.getIntValue()
 select init, constant

java/ql/test/library-tests/constants/getStringValue.expected

@@ -1,3 +1,3 @@
 | constants/Values.java:19:29:19:31 | '*' | * |
 | constants/Values.java:91:37:91:45 | "a" + "b" | ab |
-| constants/Values.java:92:29:92:38 | ... + ... | abc |
+| constants/Values.java:92:35:92:44 | ... + ... | abc |