Ensure CPD uses tab width of 1 for tabs consistently

The columns that are reported by CPD were inconsistent across languages
before. A language like Java (using a JavaCC-based tokenizer) would use
a width of 8 for tabs, whereas a language like C# (using an Antlr-based
tokenizer) would use 1 instead.

This includes unit tests for most languages to ensure a tab character is
counted as 1. The configuration for JavaCC has been adjusted to respect
this as well.

pmd-lua/src/test/java/net/sourceforge/pmd/cpd/LuaTokenizerTest.java

@@ -34,4 +34,9 @@ public class LuaTokenizerTest extends CpdTextComparisonTest {
     public void testFactorial() {
         doTest("factorial");
     }
+
+    @Test
+    public void testTabWidth() {
+        doTest("tabWidth");
+    }
 }

pmd-lua/src/test/resources/net/sourceforge/pmd/lang/lua/cpd/testdata/tabWidth.lua

@@ -0,0 +1,2 @@
+	print("Hello World")
+

pmd-lua/src/test/resources/net/sourceforge/pmd/lang/lua/cpd/testdata/tabWidth.txt

@@ -0,0 +1,7 @@
+    [Image] or [Truncated image[            Bcol      Ecol
+L1
+    [print]                                 2         6
+    [(]                                     7         7
+    ["Hello World"]                         8         20
+    [)]                                     21        21
+EOF