Preserving original column names after merge

[deHasara]

Example

product=pd.DataFrame({
   'Product_ID':[101,102,103,104,105,106,107],
   'Price':[299.0,1350.50,2999.0,14999.0,145.0,110.0,79999.0],
})


customer=pd.DataFrame({
   'id':[1,2,3,4,5,6,7,8,9],
   'age':[20,25,15,10,30,65,35,18,23],
   'Product_ID':[101,0,106,0,103,104,0,0,107],
})
modin_merge = customer.merge(product)
print(modin_merge)

     lt-0    lt-1    lt-2    rt-3    rt-4
0     1      20      101    101.0    299.0	
1 	
2 	
3 	
4 	
5 
6 	
7
8 

Column names in the merged table should be the same as that of the original tables

[vibhatha]

this will be fixed with this PR