Generalize query parameter using wildcards

[Ingvord]

e.g.

GET devices?wildcard=localhost/*/*/*

responses with all devices at localhost tango host i.e. same as GET hosts/localhost/devices

GET devices?wildcard=localhost/sys/*/*

responses with all devices in localhost/sys domain

GET devices?wildcard=localhost/sys/*/*&wildcard=hzgxenvtest/sys/*/*

responses with all devices in localhost/sys and hzgxenvtest/sys domains

GET attributes?wildcard=localhost/sys/*/*/State&wildcard=hzgxenvtest/p05/motor/rot.x/Position

responses with all State attributes in localhost/sys domain and Position of hzgxenvtest/p05/motor/rot.x