Don't store _bz2 as unsupported for python versions which included this module

python/helpers/tools/versions.xml

@@ -4224,7 +4224,6 @@
 		<module>_abcoll</module>
 		<module>_bootlocale</module>
 		<module>_bytesio</module>
-		<module>_bz2</module>
 		<module>_collections_abc</module>
 		<module>_compression</module>
 		<module>_fileio</module>
@@ -4589,7 +4588,6 @@
 		<module>__main__</module>
 		<module>_abcoll</module>
 		<module>_bytesio</module>
-		<module>_bz2</module>
 		<module>_compression</module>
 		<module>_fileio</module>
 		<module>_hotshot</module>

python/testData/inspections/PyCompatibilityInspection/underscoreBz2Module.py

@@ -0,0 +1 @@
+import <warning descr="Python version 2.4, 2.5, 2.6, 2.7, 3.0, 3.1, 3.2 do not have module _bz2">_bz2</warning>

python/testSrc/com/jetbrains/python/inspections/PyCompatibilityInspectionTest.java

@@ -172,6 +172,10 @@ public class PyCompatibilityInspectionTest extends PyTestCase {
     doTest();
   }
 
+  public void testUnderscoreBz2Module() {
+    doTest();
+  }
+
   private void doTest(@NotNull LanguageLevel level) {
     runWithLanguageLevel(level, this::doTest);
   }