Bug fix in LoRaMacMlmeRequest, case MLME_JOIN - when the node performs a rejoin, the MAC parameters must be reset to the default values.
Bug fix in LoRaMacMlmeRequest, case MLME_JOIN - when the node performs a rejoin, the MAC parameters must be reset to the default values.

abouillot/LoRaMac-node,imec-idlab/LoRaMac-node,imec-idlab/LoRaMac-node,reixd/LoRaMac-node,reixd/LoRaMac-node,abouillot/LoRaMac-node