Adding contacts to group

[Liudmila19]

summary

When user wants to add two contacts to group one of which is already belong to group - user sees "Server error" message and no contact doesn`t add to the group

expected behavior

user can add a contact that not belongs to group and see message about another contact which already exist in this group

actual behavior

When user wants to add two contacts to group one of which is already belong to group - user sees "Server error" message and no contact doesn`t add to the group

preconditions

1. User is logged
2. One contact is already added to group

steps to reproduce

1. Create new contact
2. Mark two contacts
3. Choose group you want to add contacts