Use correct broadcast EUI64

[mauimauer]

I was noticing that ZHA's zha.issue_zigbee_group_command wasn't working for the groups I had previously defined. Turns out there's some conflicting information in Digi's documentation on what EUI64 to set for multicast requests.

As per https://www.digi.com/resources/documentation/Digidocs/90002002/Default.htm#Reference/r_frame_0x11.htm%3FTocPath%3DFrame%2520descriptions%7C_____4 only 0x000000000000FFFF (Broadcast), 0x0000000000000000 (Coordinator) and an explicit EUI64 are allowed.

https://www.digi.com/resources/documentation/Digidocs/90002002/Default.htm#Concepts/c_zb_multicast_trans.htm%3FTocPath%3DTransmission%252C%2520addressing%252C%2520and%2520routing%7C_____4 indicates, and this is what zigpy-xbee does, to use 0xFFFFFFFFFFFFFFFF

Long story short. After changing the value to 0x00...FFFF it started working for me on an XSTICK2.

After the change:

2020-02-08 17:35:54 DEBUG (MainThread) [zigpy_xbee.zigbee.application] Zigbee request tsn #127: b'017f02'
2020-02-08 17:35:54 DEBUG (MainThread) [zigpy_xbee.api] Command tx_explicit (ff:ff:ff:ff:ff:ff:ff:ff, 0x0001, 1, 1, 6, 260, 0, 8, b'\x01\x7f\x02')
2020-02-08 17:35:54 DEBUG (MainThread) [zigpy_xbee.uart] Sending: b'\x11\xaa\xff\xff\xff\xff\xff\xff\xff\xff\x00\x01\x01\x01\x00\x06\x01\x04\x00\x08\x01\x7f\x02'
2020-02-08 17:35:54 DEBUG (MainThread) [zigpy_xbee.uart] Frame received: b'\x91\x00\x13\xa2\x00AXK\x11\x00\x00\x01\x01\x00\x06\x01\x04\x01\x01\x7f\x02'
2020-02-08 17:35:54 DEBUG (MainThread) [zigpy_xbee.api] Frame received: explicit_rx_indicator
2020-02-08 17:35:54 DEBUG (MainThread) [zigpy_xbee.api] _handle_explicit_rx: (00:13:a2:00:41:58:4b:11, 0x0000, 1, 6, 1, b'017f02')
2020-02-08 17:35:54 INFO (MainThread) [zigpy_xbee.zigbee.application] handle_rx self addressed
2020-02-08 17:35:54 DEBUG (MainThread) [zigpy.device] Ignoring message (b'017f02') on cluster 6: unknown endpoint or cluster id: 1
2020-02-08 17:35:54 DEBUG (MainThread) [zigpy_xbee.uart] Frame received: b'\x8b\xaa\x00\x00\x00\x00\x00'
2020-02-08 17:35:54 DEBUG (MainThread) [zigpy_xbee.api] Frame received: tx_status
2020-02-08 17:35:54 DEBUG (MainThread) [zigpy_xbee.api] tx_explicit to 0x0000: TXStatus.SUCCESS after 0 tries. Discovery Status: DiscoveryStatus.SUCCESS, Frame #170
2020-02-08 17:35:54 DEBUG (MainThread) [homeassistant.components.zha.api] Issued group command for: cluster_id: [6] command: [2] args: [] manufacturer: [None] response: (<TXStatus.SUCCESS: 0>, 'Successfully sent tsn #%s: %s')

[coveralls]

Pull Request Test Coverage Report for Build 243

• 2 of 2 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.0005%) to 99.68%

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Totals
Change from base Build 241:	0.0005%
Covered Lines:	623
Relevant Lines:	625

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💛 - Coveralls

[mauimauer]

Closing, seems now I am truly sending the request to ALL nodes, hmmm.