Incorrect response is received for files of .tif format when importing from image is used

**Affected Version:** Ketcher _Remote, release\2.1_

**Steps to reproduce:**
1. Click 'Recognize Molecule' button.
2. Click 'Choose file...'.
3. Choose a file from 1- tiff.zip format. [1- tiff.zip](https://github.com/epam/Indigo/files/5750676/1-.tiff.zip)
4. Click 'Recognize' button.
5. Verify that Image id is received.
6. Refresh the page.
7. Click 'Recognize Molecule' button.
8. Click 'Choose file...'.
9. Choose a file from 2- tif.zip format. [2 - tif.zip](https://github.com/epam/ketcher/files/5747892/tif.zip)
10. Click 'Recognize' button.

**Actual result:**
Empty string is returned instead of JSON file ({upload_id: /id/} ).

**Expected result:**
Image id is received like in step 5.