Fix CustomOperation schema

Custom operation in data field receives hex in string not array of strings.

Connected with:

• hive!1263 (merged)
• helpy!42 (merged)
• test-tools!205 (merged)
• !88 (merged)

changed the description

mentioned in commit helpy@3488ec82

mentioned in merge request helpy!42 (merged)

mentioned in commit helpy@d0eecb17

mentioned in commit test-tools@7aed6ac5

mentioned in merge request test-tools!205 (merged)

mentioned in merge request hive!1263 (merged)

changed the description

mentioned in commit hive@22888f8f

mentioned in commit hive@39cc1047

mentioned in commit hive@449dea75

mentioned in commit test-tools@d82c4877

added 2 commits

• af0fba19 - 1 commit from branch master
• bcba0959 - Fix CustomOperation schema

Compare with previous version

mentioned in commit helpy@b5dcc6cb

mentioned in commit test-tools@a931511c

mentioned in commit hive@a7972a88

mentioned in commit hive@13463bd9

mentioned in commit hive@05f67f02

mentioned in commit hive@9d651cf2

mentioned in commit hive@2c50baa4