Make GET request logs filterable throught app's filter_parameters

[agesnoui]

Update GET request logging from string to hash to enable apps using this gem to filter out sensitive information in URIs.
The following log should evolve from:

INFO -- : GETTING: https://fhir-api.internal.staging.lifen.fr/fhir/Patient?_count=20&_sort=-
_lastUpdated&active:not=false&birthdate=1925-02-26&family:exact=aldrin&general-
practitioner=Organization/689802&given:exact=buzz

to:

INFO -- : "GETTING: {:scheme=>\"https\", :host=>\"fhir-api.internal.staging.lifen.fr\", :port=>nil,
:path=>\"/fhir/Patient\", :query=>{\"_count\"=>\"20\", \"_sort\"=>\"-_lastUpdated\",
\"active:not\"=>\"false\", \"birthdate\"=>\"1925-02-26\", \"family:exact\"=>\"aldrin\",
\"general-practitioner\"=>\"Practitioner/350035\", \"given:exact\"=>\"buzz\"}, :fragment=>nil}"

eventually enabling filtering the following way:

INFO -- : "GETTING: {:scheme=>\"https\", :host=>\"fhir-api.internal.staging.lifen.fr\", :port=>nil,
:path=>\"/fhir/Patient\", :query=>{\"_count\"=>\"20\", \"_sort\"=>\"-_lastUpdated\",
\"active:not\"=>\"false\", \"birthdate\"=>\"[FILTERED]\", \"family:exact\"=>\"[FILTERED]\",
\"general-practitioner\"=>\"Practitioner/350035\", \"given:exact\"=>\"[FILTERED]\"}, :fragment=>nil}"