OBIDMS: Opened DMS now have a counter associated so that DMS are not

actually opened several times by the same program, which triggers the
cleaning of unfinished views and columns (to discuss)

python/obitools3/dms/capi/obidms.pxd

@@ -14,7 +14,7 @@ cdef extern from "obidms.h" nogil:
     OBIDMS_p obi_test_open_dms(const_char_p dms_path)
     OBIDMS_p obi_create_dms(const_char_p dms_path)
     int obi_dms_exists(const char* dms_path)
-    int obi_close_dms(OBIDMS_p dms)
+    int obi_close_dms(OBIDMS_p dms, bint force)
     char* obi_dms_get_dms_path(OBIDMS_p dms)
     char* obi_dms_get_full_path(OBIDMS_p dms, const_char_p path_name)
     void obi_close_atexit()

python/obitools3/dms/dms.pyx

@@ -92,7 +92,7 @@ cdef class DMS(OBIWrapper):
         cdef OBIDMS_p pointer = self.pointer()
         if self.active() :
             OBIWrapper.close(self)
-            if (obi_close_dms(pointer)) < 0 :
+            if (obi_close_dms(pointer, False)) < 0 :
                 raise Exception("Problem closing an OBIDMS")