Added select_members
Bug fixed frequency, select_chunk , conditional dependencies while using select chunk,
Merged select_members and select_chunks to be able to use both.
Deleted the restriction that current job need to be running on chunk
Improved the graph generation while using select_chunk or select_member

Tentative fix for locale
Tentative fix for wrappers in nord4.bsc.es

Conditional dependency

See merge request !281

Added anti lock mechanism on database functions. Added some validation to the...

See merge request !280

Added anti lock mechanism on database functions. Added some validation to the improved delete experiment function. Modified a condition on the main exception handling mechanism, trace can be an integer and len(trace) can raise a further exception.