Check all dba_objects used in the data access layer to fix #99

Author: PhilippSalvisberg

sqldev/src/main/java/org/utplsql/sqldev/dal/UtplsqlDao.xtend

@@ -121,9 +121,17 @@ class UtplsqlDao {
 		if (cachedDbaViewAccessible === null) {
 			try {
 				val sql = '''
-					SELECT 1
+					SELECT 1 AS dummy
 					  FROM dba_objects
 					 WHERE 1=2
+					UNION ALL
+					SELECT 1
+					  FROM dba_synonyms
+					 WHERE 1=2
+					UNION ALL
+					SELECT 1
+					  FROM dba_dependencies
+					 WHERE 1=2
 				'''
 				jdbcTemplate.execute(sql)
 				cachedDbaViewAccessible = true