Fix JC-1760:
Error messages for empty 'Username' and 'Password' fields should be in the same style
Error message for empty 'Password' field should be 'Password length must be between 1 and 50 characters' instead of 'Must not be empty'
Fix full error JC-1760:
Sign Up: Error messages in 'Username' and 'Password' fields must be the same
JC-1760
Added new annotation NotBlankSize and new validator NotBlankSizeValidator
Changed UserDto
JC-1760:
Hardcode values ​​in properties files
JC-1760
Corrected 0 to 1 in the message
Merge branch 'master' of https://github.com:syapa/jtalks-org/jcommune into JC-1760
Merge branch 'JC-1760' of https://github.com:syapa/jtalks-org/jcommune into JC-1760