InputStream use fix in PorpoertiesStorage

- Properties object polulation using PropertiesUtil.loadFromFile
- test added
- the separate FileNotFoundException handling block was removed as the next IOException block is catching it and it is only logging

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>
InputStream use fix in PropertiesUtil

- use PropertiesUtil.loadFromFile to read the properties
- test added

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>
InputStream use fix in LibvirtComputingResource

- Properties object polulation using PropertiesUtil.loadFromFile

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>
InputStream use fix

Closes the FileInputStream opened at configuration in
- ClusterManagerImpl
- ClusterServiceServletAdapter
- TransactionLegacy
- AsyncJobManagerImpl
- DBEncryptionUtil
- EncryptionSecretKeyChecker

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>
InputStream use fix in ProcessUtil

- use PropertiesUtil to load Properties from file

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>
Remove test dependency on mysql driver

The dependency is no longer needed.
License header added to PropertiesStorageTest

Signed-off-by: Laszlo Hornyak <laszlo.hornyak@gmail.com>