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-cs/src/test/java/net/sourceforge/pmd/cpd/CsTokenizerTest.java

@@ -85,6 +85,11 @@ public class CsTokenizerTest extends CpdTextComparisonTest {
         doTest("usingDirectives", "_ignored", ignoreUsings());
     }
 
+    @Test
+    public void testTabWidth() {
+        doTest("tabWidth");
+    }
+
     private Properties ignoreUsings() {
         return properties(true);
     }

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

@@ -0,0 +1 @@
+	int i = 0;

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

@@ -0,0 +1,8 @@
+    [Image] or [Truncated image[            Bcol      Ecol
+L1
+    [int]                                   2         4
+    [i]                                     6         6
+    [=]                                     8         8
+    [0]                                     10        10
+    [;]                                     11        11
+EOF