test: Set organization name

[hebasto]

From Qt docs:

If QCoreApplication::setOrganizationName() and QCoreApplication::setApplicationName() has not been previously called, the QSettings object will not be able to read or write any settings, and status() will return AccessError.

Fixes https://github.com/bitcoin-core/gui/issues/799.

[DrahtBot]

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Reviews

See the guideline for information on the review process.	Type	Reviewers
ACK	pablomartin4btc
Stale ACK	sipsorcery

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[hebasto]

Friendly ping @ryanofsky @sipsorcery @furszy @jarolrod

[sipsorcery]

Building this PR with msvc and running test_bitcoin-qt.exe gives me:

...snip...
********* Start testing of OptionTests *********
Config: Using QtTest library 5.15.11, Qt 5.15.11 (x86_64-little_endian-llp64 static release build; by MSVC 2022), windows 11
PASS   : OptionTests::initTestCase()
PASS   : OptionTests::migrateSettings()
PASS   : OptionTests::integerGetArgBug()
PASS   : OptionTests::parametersInteraction()
PASS   : OptionTests::extractFilter()
PASS   : OptionTests::cleanupTestCase()
Totals: 6 passed, 0 failed, 0 skipped, 0 blacklisted, 20ms
********* Finished testing of OptionTests *********
...snip...

Does that demonstrate the fix?

[hebasto]

Building this PR with msvc and running test_bitcoin-qt.exe gives me:

...snip...
********* Start testing of OptionTests *********
Config: Using QtTest library 5.15.11, Qt 5.15.11 (x86_64-little_endian-llp64 static release build; by MSVC 2022), windows 11
PASS   : OptionTests::initTestCase()
PASS   : OptionTests::migrateSettings()
PASS   : OptionTests::integerGetArgBug()
PASS   : OptionTests::parametersInteraction()
PASS   : OptionTests::extractFilter()
PASS   : OptionTests::cleanupTestCase()
Totals: 6 passed, 0 failed, 0 skipped, 0 blacklisted, 20ms
********* Finished testing of OptionTests *********
...snip...

Does that demonstrate the fix?

Exactly.

[sipsorcery]

tACK 49cf63522e202caf326bad161ff6fa05d1076566.