[oracle] allow occi includes also with cling

CINT was not able to parse them correctly

sql/oracle/inc/TOracleResult.h

@@ -16,22 +16,15 @@
 
 #include <vector>
 
-#if !defined(__CINT__)
 #ifndef R__WIN32
 #include <sys/time.h>
 #endif
+
 #include <occi.h>
+
 #ifdef CONST
 #undef CONST
 #endif
-#else
-namespace oracle { namespace occi {
-class Connection;
-class Statement;
-class ResultSet;
-class MetaData;
-   }}
-#endif
 
 class TList;
 

sql/oracle/inc/TOracleRow.h

@@ -14,17 +14,11 @@
 
 #include "TSQLRow.h"
 
-#if !defined(__CINT__)
 #include <occi.h>
+
 #ifdef CONST
 #undef CONST
 #endif
-#else
-namespace oracle { namespace occi {
-class ResultSet;
-class MetaData;
-   }}
-#endif
 
 class TOracleRow : public TSQLRow {
 

sql/oracle/inc/TOracleServer.h

@@ -14,21 +14,15 @@
 
 #include "TSQLServer.h"
 
-#if !defined(__CINT__)
 #ifndef R__WIN32
 #include <sys/time.h>
 #endif
+
 #include <occi.h>
+
 #ifdef CONST
 #undef CONST
 #endif
-#else
-namespace oracle { namespace occi {
-class Environment;
-class Connection;
-}}
-#endif
-
 
 class TOracleServer : public TSQLServer {
 

sql/oracle/inc/TOracleStatement.h

@@ -14,20 +14,11 @@
 
 #include "TSQLStatement.h"
 
-#if !defined(__CINT__)
 #include <occi.h>
+
 #ifdef CONST
 #undef CONST
 #endif
-#else
-namespace oracle { namespace occi {
-class Environment;
-class Connection;
-class Statement;
-class ResultSet;
-class MetaData;
-   }}
-#endif
 
 class TOracleStatement : public TSQLStatement {