Issue Summary

When importing data through the Assets external importer string values containing leading zeros are incorrectly interpreted as octal (base-8) integers and converted to decimal.

Steps to Reproduce

1. Create external import
2. Choose attribute(mapped to be text )
3.  In the JSON payload the value is "064276" but in the attribute the value becomes 26814. 
4. It  is being seen as an octal (base-8) integer

Expected Results

It should be treated as Text and imported as 064276

Actual Results

octal (base-8) integer conversion is happening even though it is parsed as text

Workaround

Use _ before 0 to avoid this conversion