0025324: Make OCCT collections copy-constructible

Since TCollection package is going to be obsolete we change only classes that are currently needed to have copy constructor.

src/TCollection/TCollection_Sequence.cdl

@@ -70,11 +70,8 @@ is
     	    	-- assignment operator (operator=).
  		---C++: inline
 
-	Create(Other : Sequence) returns Sequence from TCollection
+	Create(Other : Sequence) returns Sequence from TCollection;
 		---Purpose: Creation by copy of existing Sequence.
-		--  Warning: This constructor prints a warning message.
-		-- We recommand to use the operator =.
-	is private;
 		
 	Clear(me : in out);
 		---Purpose: Removes all element(s) of the sequence <me>

src/TCollection/TCollection_Sequence.lxx

@@ -23,6 +23,16 @@ inline TCollection_Sequence::TCollection_Sequence()
 {
 }
 
+//=======================================================================
+//function : Copy constructor
+//purpose  : 
+//=======================================================================
+
+inline TCollection_Sequence::TCollection_Sequence(const TCollection_Sequence& theOther)
+{
+  Assign(theOther);
+}
+
 //=======================================================================
 //function : Append 
 //purpose  : Appends a Sequence to myself