Update version to v29r0

See merge request !379

Release notes for Gaudi v28r3

See merge request !378

Clean up for release

See merge request !377

Extend the criterion of data dependency resolution

Promote an algorithm to DATAREADY if all its data supplying algorithms
were executed, regardless of EVTACCEPTED or EVTREJECTED state.

See merge request !368

Autodeclaring constructors for ToolHandle and DataObjectHandle

See merge request !374

it allows declaration and initialization of DataObjectHandle data members in
headers (as for Gaudi::Property).

To simplify declaration of read or write handles, two helper classes have been
added:
- DataObjectReadHandle
- DataObjectWriteHandle

For example
```cpp
class MyAlg: public Algorithm {
  using Algorithm::Algorithm;
  DataObjectReadHandle<Tracks> m_tracks{this, "TracksLocation",
                                        "/Event/Rec/Tracks"};
  DataObjectWriteHandle<Vertices> m_vertices{this, "VerticesLocation",
                                             "/Event/Rec/Vertices"};
};
```

it allows declaration and initialization of ToolHandle data members in
headers (as for Gaudi::Property):
```cpp
class MyAlg: public Algorithm {
  using Algorithm::Algorithm;
  Gaudi::Property<bool> m_flag{this, "Flag", false};
  ToolHandle<IMyTool> m_myTool{this, "MyTool", "MyToolType"};
};
```

Tool handles for public tools must be declared as `PublicToolHandle`.

add a call to setFilterPassed in the CPUCruncher and add GaudiHive test for ControlFlowBranching+CrossBranchDataFlow

to use the same method name as Algorithm: declareTool

minor updates/fixes

See merge request !373

relaxed a bit a check to be less sensitive to the load of the machine

In CMake 3.9 the OLD behaviour is deprecated, so we must switch to the
new behaviour and to require CMake >= 2.8.12.

See https://cmake.org/cmake/help/v3.9/policy/CMP0026.html

Property helpers for DataHandles and derived classes

See merge request !365# Please enter a commit message to explain why this merge is necessary,

Reallowed global postprocessing in ScalarTransformer

See merge request !364

allow ADL of `toString` in Property

See merge request !372

make Property::documentation() return the actual documentation string

See merge request !363

Fixed coverity issues:

* KeyedObjectManager.cpp
  * 64154: Iterator container mismatch
  * 64281: Invalid iterator comparison
* ProcessDescriptor.cpp
  * 64293: Out-of-bounds write
* AvalancheSchedulerSvc.cpp
  * 94135: Dereference after null check
  * 94134: Dereference after null check
  * 94669: Unchecked dynamic_cast
* HiveTestAlgorithm.cpp
  * 82289: Unchecked dynamic_cast

See merge request !357

Do not modify DataObjectHandleBase python binding on add

See merge request !342

added ICondSvc to GaudiKernel

See merge request !315

Merge branch 'extend-DR-criterion' of https://gitlab.cern.ch/ishapova/Gaudi into extend-DR-criterion

promote an algorithm as DATAREADY if all its data supplying algorithms are either in EVTACCEPTED, or in EVTREJECTED state (before, only EVTACCEPTED was allowed)

Fixes to CMake modules

- improved inherited heptools version lookup
- fixed backward compatibility issue
- fixed GAUDI-1299 (fix ignore of subdirectories if binary tag contains `+`)
- fixed issue with data package lookup for versions without digits
- fixed content of `manifest.xml` for special platform `*-do0`
- protected AFS workaround to avoid problems with CMVFS
- improve relocatability of compiler path (via `LCG_releases_base` env var)
- removed a few hacks for old versions of gcc
- enable c++17 for gcc >= 7

See merge request !312

also enable c++1z for clang >= 3.9

by helping other tools like the lcg-g++-x.y.z wrappers used in LHCb.