MF-1317 - Configurable regexp rule for password (#1355)

* read and validate regex envar

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* pass regexp to user/api

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* resolve conflicts

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* use exported regexp variable

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* move password validation from users package

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* remove dead code

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* add password change request

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* move regexp from api to users package

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* fix tests

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* remove commented code

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* add regexp as field in userService, remove it as user exported global var

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* add passwd validation in service

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* Add psswd validation for change password in service

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* add password validation in password reset

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* Remove password validation from user validation test

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* Replace email and passwords in test with constants

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* compile error not fail silently

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

* fix tempate path

Signed-off-by: Ivan Milosevic <iva@blokovi.com>

scripts/run.sh

@@ -38,7 +38,7 @@ done
 ###
 # Users
 ###
-MF_USERS_LOG_LEVEL=info MF_EMAIL_TEMPLATE=../docker/users/emailer/templates/email.tmpl $BUILD_DIR/mainflux-users &
+MF_USERS_LOG_LEVEL=info MF_EMAIL_TEMPLATE=../docker/templates/users.tmpl $BUILD_DIR/mainflux-users &
 
 ###
 # Things