Improve export genesis for oracle module to include more information

[ntchjb]

In order to preparing for Bandchain's Laozi chain, all states from Guanyu chain need to be exported. Therefore, the following information is included in exported genesis JSON file.

• Oracle script info & file bytes
• Data source info & file bytes
• Parameters of oracle module
• List of reporters, where each element contains a validator address and a list of reporter addresses related to the validator.

Fixed: BAND-294

Implementation details

The following data will be exported as genesis for new Laozi chain.

• Oracle script info
• Oracle script file bytes (represents as base64)
• Data source info
• Data source file bytes (represents as base64)
• Parameters of oracle module
• Map of reporters and validators where key is reporter address in bech32 format and value is validator address kept as ValAddress (represents as bech32 validator address string).

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