CESNET/perun: v3.29.0

<a href="https://github.com/CESNET/perun/compare/v3.28.0...v3.29.0">3.29.0</a> (2021-08-10) Bug Fixes <ul> <li><strong>core:</strong> allowed included groups in modules sendAs, sendOnBehalf (<a href="https://github.com/CESNET/perun/commit/b9e5aa1743638cb95d2c4a0a8fce58dcfe1d6bf1">b9e5aa1</a>)</li> <li><strong>core:</strong> wait before member async validation (<a href="https://github.com/CESNET/perun/commit/62b1238a79d3dc1859512ada7fd7901af52c5b0a">62b1238</a>)</li> <li><strong>gui:</strong> Fixed unresponsive tabs for form item editing (<a href="https://github.com/CESNET/perun/commit/722ef63eded254775442ce96f0ddf6060a6df809">722ef63</a>)</li> <li><strong>registrar:</strong> Constant-time MAC comparison (<a href="https://github.com/CESNET/perun/commit/df036833a850351435500745244e2454ea849a23">df03683</a>)</li> </ul> Features <ul> <li><strong>core:</strong> allow empty login in module login-namespace:mu-adm (<a href="https://github.com/CESNET/perun/commit/51e970bdbe139947e47bc25714866aa4247eba53">51e970b</a>)</li> <li><strong>core:</strong> module studentIdentifiers changed to create and remove userExtSources with attributes (<a href="https://github.com/CESNET/perun/commit/b5bc9fd2f8e79cbcb168c62e967209f6019c288f">b5bc9fd</a>)</li> <li><strong>core:</strong> new user virtual attribute studentIdentifiers (<a href="https://github.com/CESNET/perun/commit/550e515575945a126384ad2340c23ce632f5cc51">550e515</a>)</li> <li><strong>ldap:</strong> Add attribute studentIdentifiers to LDAP schema (<a href="https://github.com/CESNET/perun/commit/572145980f7a8ba3f282b0300a5e6bd6ac765e51">5721459</a>)</li> <li><strong>registrar:</strong> VO and group application notifications adjustment (<a href="https://github.com/CESNET/perun/commit/2af55a2b76583326de3126a1901b43e8bdcfe7b7">2af55a2</a>)</li> <li>add method reserveRandomPassword to OpenAPI (<a href="https://github.com/CESNET/perun/commit/2c69369eb29949b6016d8e12f765b142f4495c81">2c69369</a>)</li> <li><strong>core:</strong> store cause of group-resource assignment failure (<a href="https://github.com/CESNET/perun/commit/d6704080a03125f59763c461e970017d5f768271">d670408</a>)</li> <li><strong>perun:</strong> method isLoginAvailable added to OpenAPI (<a href="https://github.com/CESNET/perun/commit/a5d361dd05ce74fb8f0f3a720d4a1f2bf5e0a6e9">a5d361d</a>)</li> </ul> Performance Improvements <ul> <li><strong>core:</strong> adjust threads pool for async tasks (<a href="https://github.com/CESNET/perun/commit/dc6a339bb9911fccd9c4a217d3aebd8c9dd30777">dc6a339</a>)</li> </ul&gt