<fix>[cleanup]: rename InterruptedException variable to avoid shadowing

In ExponStorageController and XInfiniStorageController, the inner
catch(InterruptedException e) shadowed the outer catch(Exception e),
causing a compile error. Renamed to 'ie'.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: AlanJager

plugin/expon/src/main/java/org/zstack/expon/ExponStorageController.java

@@ -1420,7 +1420,7 @@ private void retry(Runnable r, int retry) {
                 logger.warn("runnable failed, try ", e);
                 try {
                     TimeUnit.SECONDS.sleep(3);
-                } catch (InterruptedException e) {
+                } catch (InterruptedException ie) {
                     Thread.currentThread().interrupt();
                 }
             }

plugin/xinfini/src/main/java/org/zstack/xinfini/XInfiniStorageController.java

@@ -1140,7 +1140,7 @@ private void retry(Runnable r, int retry) {
                 logger.warn("runnable failed, try ", e);
                 try {
                     TimeUnit.SECONDS.sleep(3);
-                } catch (InterruptedException e) {
+                } catch (InterruptedException ie) {
                     Thread.currentThread().interrupt();
                 }
             }