Fix the issues on skipped tests

[tuliomir]

On the Integration Tests implemented on #149 and #152 , a few of the tests had to be skipped because the application did not work as planned. There are also some TODO comment tags on the code that need to be addressed.

This issue will map and monitor these fixes.

• On create-token, tests should reject a name with more than 30 characters and should reject a symbol with more than 5 characters
  There is an error on the internal wallet-lib storage that happens when a request for an invalid token arrives and, since there are no web-socket updates because the transaction did not happen, this mistake is not corrected.

• fix: utxo-filter parameter only-available #179
  On utxo-filter, test should return correct results for only_available: the operator only_available is not working.

• fix: skipped multisig tests #191
  On Integration tests: utxo-filter, utxo-consolidation, create-nft #164 the multisig tests broke and were skipped. It's necessary to investigate the root of this problem and fix it.