turn disconnect ON, when there will be lots of them and they have
moments when there will be little DB activity.  The new disconnect system
disconnects so much, that it's slower than before, so must use sparingly.

output jobs) is it needs a fast database, so don't disconnect_when_inactive

created new() methods where needed, replaced throw, rearrange as needed

If type is defined in url string, that will take precedence.
Bio::EnsEMBL::Hive::URLFactory->fetch($url, 'compara'); #defaults to compara DBA
Bio::EnsEMBL::Hive::URLFactory->fetch($url); #defaults to hive DBA

inherit from them (as in $dba->dbc->)

eg: mysql://ensro@ecs4:3352/ensembl_compara_22_1;type=compara
current types are (core, hive, compara, pipeline) (default is hive)

Also changed to a global class instance so that cleanup can be
automatic via  DESTROY method. Deprecated cleanup method.

as DONE now with LSF, and EXIT will be reserved for true failure cases

blocking can occurr both at the job level and the analysis level.
To block and unblock at the job level will require specific analyses to
determine logic, and will not be implemented in a generic way within the
hive system.

on failure and retry_count>=5. Also changed Queen analysis summary to
classify an analysis as 'DONE' when all jobs are either DONE or FAILED
and hence allow the processing to proceed forward.

it syncs and displays a full summary of the state of the hive including
what workers were overdue, how many are needed, and what workers are running.
Also changed the check_for_dead to use the LSF bjobs command since I now
store an LSF job_id and array_index in the process_id for LSF workers.
Also changed the overdue time limit to 75minutes since the expected lifetime
is 60minutes.

as well also set the beekeeper to LSF.  Commented this.

to prevent excessive workers from saturating the system.

when a bsub is issued without a job array and bjobs does not like 234234[0] as a job_id

added to a users path and the programs run from any directory

which causes a more even distribution of workers types as they are created by the Queen.

lsf job arrays (e.g. 72344[3]).
Also changed analysis_job index (analysis_id, status) so that the
analysis_id is indexed first which provides better indexing when only
the analysis_id is specified.

also changed time intervals (overdue workers now to 75 minutes and
poll interval to 5 minutes).  The polling load to check hive status is
essentially zero.

Can't seem to figure out way of passing lsf job_id and array_index as parameter
so hardcoded access of environment variables LSB_JOBID and LSB_JOBINDEX
inside runWorker script.  If both variables are set this should imply that the
worker was created by an lsf deamon and to use these values to check
the worker's life state in time and space. Otherwise the process_id will
fall back on the ppid of the process (on the 'host' it's running on).

setting (e.g. lsf job_id and array_index

are stored in the worker.out output file.

workers currently running

are running so that any unregistered worker can be assumed to be a fatality
and it's jobs reset.
Also added -loop option to run the beekeeper in an autonomous manner.

the analysis has effectively no system load and an unlimited number of
workers of that analysis can run at any one time.

added get_num_needed_workers method which does a load analysis between
the living workers and the workers needed to complete the available jobs.
Returns a simple count which a beekeeper can use to allocate workers on computers.
The workers are created without specific analyses but get assigned one by the
Queen when they are created.

system load (higher hive_capacity) are picked first

Also added functionality so that runWorker can be run without
specification of an analysis.  The create_new_worker method now will
query for a 'needed worker' analysis from the AnalysisStats adaptor when
the analysis_id is undef.  This simplifies the API interface between the
Queen and the beekeepers.  Now the beekeeper only needs to receive a count
of workers.  The workers can still be run with explicit analyses for
testing or situations where one wants to manually control the processing.
Now one can simply do
bsub -JW[1-100] runWorker -url mysql://ensadmin:<pass>@ecs2:3361/compara_hive_jess_23
to create 100 workers which will become whatever analysis that needs to be done.

decrement_needed_workers method. These are used by the Queen to pick an
analysis for a newly created worker when one wasn't specified