[#4] Add logs when unable to create bundle temp directory (#31)

Author: vharseko

OpenICF-java-framework/connector-framework-internal/src/main/java/org/identityconnectors/framework/impl/api/local/LocalConnectorInfoManagerImpl.java

@@ -489,10 +489,16 @@ private File getBundleTempDir() throws IOException {
             if (!tempDir.exists()) {
                 throw new IOException("Temporary directory " + tempDir + " does not exist");
             }
+            if (!tempDir.canWrite()) {
+                throw new IOException("Temporary directory " + tempDir + " is read/only");
+            }
             File candidate;
             do {
                 candidate = new File(tempDir, "bundle-" + nextRandom());
-            } while (!candidate.mkdir());
+            } while (candidate.exists());
+            if (!candidate.mkdir()) {
+                throw new IOException("Temporary directory " + tempDir + " is read/only");
+            }
             candidate.deleteOnExit();
             _bundleTempDir = candidate;
             return candidate;