[UWS,TAP] Review the standard parameters checking. Particularly, because before, the default value was never used while no value was specified by the user.

[UWS] Cancel last commit. The UWSException was thrown intentionnaly: if an error occurs while just creating the thread, this error should not impact the job ; it is an internal server error, not an error due to the job execution or of a wrong parameter. This error MUST be thrown AND the job MUST stay PENDING (so that it can be restarted later when the server bug will be fixed). Job parameters checks MUST be done either in the job execution (JobThread.jobWork()) or at the job creation (using an InputParamController).

[UWS] End of 'Fix synchronization bug while generating the default Job ID' (commit e6a9d52f)

[UWS] Make XML representation of jobs and joblists valid (with their XML schema), and particularly the nodes jobs, job and the error type (which should be written in lower-case).

[UWS,TAP] Fix timestamp format. Now, each returned date will expressed in UTC and using the ISO8601 format. Any given date is also expected in UTC (or with a time zone offset) and in ISO8601Format. These rules apply also for uploaded tables and for timestamp columns in a query result.

[TAP,UWS] Make valid VOTable results and errors. Some error messages about expected TAP request parameters have been changed.

[TAP,UWS] Fix a problem with the format of the error details returned by the parameter .../error/details. In TAP a VOTable document is expected, but a text/plain description was returned (default behavior in the UWS lib.). Now, a ServiceErrorWriter is used to format the error details correctly.

[TAP,UWS] Small log corrections (for Thread logs, display the thread name rather than the ID ; the job id was forgotten in the log of CHANGE_PHASE ; build a UWSException with the given throwable message as message ; in log TAP for the event EXECUTING, the memory address of the ADQLQuery object was displayed rather than of the ADQL query expression ; display the stack trace of the SQLException.getNextException() when calling logDB)

[TAP,UWS] Manage thrown Error properly in synchronous and asynchronous jobs execution + Modify some log messages + Add log messages in JDBCConnection (for add and drop uploaded tables).

[UWS,TAP] Review the exceptions and logs management + Add log file rotation (with a configurable rotation frequency)

[UWS] Improve the test of an URL: it may be null or the interesting part of it can be ; the two cases must be tested.