Fix memory leak of pfs keys#444

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prohaska7 wants to merge 12 commits intopercona:masterfrom

prohaska7:apr2020-leak-pfs-keys

Commits on Apr 11, 2020

glibc 2.30 defines the gettid system call, which conflicts with the
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Remove ctest timeout property so that we can use the ctest --timeout parameter instead.
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Fix ydb tests that fail due to loose file permissions. Note that file permissions were changed in commit 5aca29f.
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Remove obsolete debug code that was left in the tests by accident.
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Add locktree and ydb tests cases that expose the lock request retry
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When a lock is released, pending lock requests are retried. If the
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Speed up helgrind_test_partitioned_counter test by running helgrind
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Fix a test that crashed in put_callback due to a null deref. The test
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Ignore mallopt error return in memory_init when running the address sanitizer. This allows the tests to run.
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Suppress pthread_mutex_destroy race with pthread_mutex_unlock again.
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Suppress memcheck uninitialized data jump in lz_encoder_prepare. See https://prohaska7.blogspot.com/2015/11/uninitialized-data-problem-in-lzma.html for details.
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Some ydb tests leak memory for pfs keys. Fix the ydb library init and destroy functions.
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