[Users] removed avp_write(); avp_aliases moved in core

[Daniel-Constantin Mierla]

Hello,

two major changes were applied to avpops module in development branch 
(1.2.0):

- avp_write() has been removed - same functionality is provided by 
assignment operator in routing blocks, together with latest commit of PV 
transformations

- avp_aliases parameter has been removed from avpops module and 
introduced as core parameter. you can use it directly in core, in global 
parameters section in form of:

avp_aliases="uuid=I:660;email=s:email_addr;fwd=i:753"

The value is the same as it was for avpops parameter. Now the AVP aliases can be used directly in routing blocks.

Cheers,
Daniel