create_tag doesn't process case when tags is int

[s-medvedev]

Impact:
Some post doesn't converted (~10 items)

STR:
Convert some posts (for example author mmalikov and permlink qmycpexxiwp8zshuupsogb2w3wshocfuqvgh7s3kannchj) from Golos to Cyberway database

Actual result:

("'int' object is not iterable",)
Traceback (most recent call last):
  File "./convert_publish.py", line 111, in convert_posts
    tags = create_tags(doc["json_metadata"]["tags"])
  File "./convert_publish.py", line 16, in create_tags
    for tag in metadata_tags or []:
TypeError: 'int' object is not iterable

Expected result:
Post converted successfully

Additional info:

{'_id': ObjectId('d2760f4fa659276111a1cb38'), 'abs_rshares': 0, 'active': datetime.datetime(2018, 4, 10, 0, 39, 51), 'allow_curation_rewards': True, 'allow_replies': True, 'allow_votes': True, 'author': 'mmalikov', 'block_num': 15643827, 'body': '\n            <img src="http://www.viboard.me/dist/banner.png" alt="QmYCPEXXiwp8zSHuUPsogb2W3wShoCFuqVGH7s3KAnNchj">', 'cashout_time': datetime.datetime(2106, 2, 7, 6, 28, 15), 'category': 'videotest', 'children': 0, 'children_abs_rshares': 0, 'children_rshares2': 0, 'created': datetime.datetime(2018, 4, 10, 0, 39, 51), 'depth': 0, 'json_metadata': {'tags': 3}, 'last_payout': datetime.datetime(2018, 4, 17, 0, 39, 51), 'last_update': datetime.datetime(2018, 4, 10, 0, 39, 51), 'max_accepted_payout_symbol': 'GBG', 'max_accepted_payout_value': 1000000.0, 'max_cashout_time': datetime.datetime(2106, 2, 7, 6, 28, 15), 'mode': 'archived', 'net_rshares': 0, 'net_votes': 3, 'parent_author': '', 'parent_permlink': 'videotest', 'percent_steem_dollars': 10000, 'permlink': 'qmycpexxiwp8zshuupsogb2w3wshocfuqvgh7s3kannchj', 'removed': False, 'reward_weight': 10000, 'root_comment': ObjectId('d2760f4fa659276111a1cb38'), 'title': 'LEGOs', 'total_vote_weight': 0, 'vote_rshares': 0, 'author_gbg_payout_symbol': 'GBG', 'author_gbg_payout_value': 0.0, 'author_gests_payout_symbol': 'GESTS', 'author_gests_payout_value': 0.0, 'author_golos_payout_symbol': 'GOLOS', 'author_golos_payout_value': 0.0, 'author_rewards': 0, 'beneficiary_gests_payout_symbol': 'GESTS', 'beneficiary_gests_payout_value': 0.0, 'beneficiary_payout_symbol': 'GBG', 'beneficiary_payout_value': 0.0, 'curator_gests_payout_symbol': 'GESTS', 'curator_gests_payout_value': 0.0, 'curator_payout_symbol': 'GBG', 'curator_payout_value': 0.0, 'total_payout_symbol': 'GBG', 'total_payout_value': 0.0}
("'int' object is not iterable",)
Traceback (most recent call last):
  File "./convert_publish.py", line 111, in convert_posts
    tags = create_tags(doc["json_metadata"]["tags"])
  File "./convert_publish.py", line 16, in create_tags
    for tag in metadata_tags or []:
TypeError: 'int' object is not iterable

[adedkov]

#243