增加异常日志

增加异常日志-对于由于驱动加载与JAVA版本问题导致的Error无法看到任何日志，导致不好排查问题

src/main/java/com/alibaba/druid/pool/DruidDataSource.java

@@ -843,7 +843,11 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
             throw e;
         } catch (InterruptedException e) {
             throw new SQLException(e.getMessage(), e);
-        } finally {
+        } catch (Throwable e){
+            LOG.error("{dataSource-" + this.getID() + "} init error", e);
+            throw e;
+        }
+        finally {
             inited = true;
             lock.unlock();