fixed PY-11047 "Python version 3.3 does not have module exceptions" on relative import

do not run inspection on relative imports

python/src/com/jetbrains/python/inspections/PyCompatibilityInspection.java

@@ -239,6 +239,7 @@ public class PyCompatibilityInspection extends PyInspection {
     @Override
     public void visitPyFromImportStatement(PyFromImportStatement node) {
       super.visitPyFromImportStatement(node);
+      if (node.getRelativeLevel() > 0) return;
       int len = 0;
       StringBuilder message = new StringBuilder("Python version ");
       PyQualifiedName name = node.getImportSourceQName();

python/testData/inspections/PyCompatibilityInspection/relativeImport.py

@@ -0,0 +1 @@
+<warning descr="Python version 2.4 doesn't support this syntax.">from ..exceptions import ServiceDoesNotExists</warning>

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

@@ -130,6 +130,11 @@ public class PyCompatibilityInspectionTest extends PyTestCase {
     doTest(LanguageLevel.PYTHON33);
   }
 
+  // PY-11047
+  public void testRelativeImport() {
+    doTest();
+  }
+
   private void doTest(@NotNull LanguageLevel level) {
     runWithLanguageLevel(level, new Runnable() {
       @Override