[tests] Remove efectless pre-steps

Relates NEMO#663
[tests] Remove useless pre-step

Relates NEMO#663
[tests] Do not redirect output to file

Relates NEMO#663
[tests] runstarget.sh: do not always exit with 0

The test binary is now ``exec''ed to work well as GDB's exec-wrapper.

Relates NEMO#663
[tests] Remove unused environment settings

Relates NEMO#663
[storageplugins] Always build hcalendar and hnotes

Built conditionaly only for linux-g++-maemo since 078965b

Relates NEMO#663
[syncmlcommon] Remove orphaned build conditional

Should have been removed with 277c38c088f0a5fc86dd44041536c35109bde588
[storageplugins] Remove outdated build conditional
Add hcalendar/hnotes tests to .gitignore