Resolve "Retrieve samples by instrument"

Closes #442 (closed)

The endpoint /catalogue/sessionId/samples accepts now instrumentName

Performance is:

ab "https://icatplus.esrf.fr/catalogue/d7d56802-a6b7-4bdb-832e-77e35a8395f9/samples?instrumentName=ID23-1&sortBy=DATE&sortOrder=-1&havingAcquisitionDatasets=true&limit=2&skip=0"
This is ApacheBench, Version 2.3 <$Revision: 1843412 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking icatplus.esrf.fr (be patient).....done


Server Software:        
Server Hostname:        icatplus.esrf.fr
Server Port:            443
SSL/TLS Protocol:       TLSv1.2,ECDHE-RSA-AES128-GCM-SHA256,4096,128
Server Temp Key:        X25519 253 bits
TLS Server Name:        icatplus.esrf.fr

Document Path:          /catalogue/d7d56802-a6b7-4bdb-832e-77e35a8395f9/samples?instrumentName=ID23-1&sortBy=DATE&sortOrder=-1&havingAcquisitionDatasets=true&limit=2&skip=0
Document Length:        4577 bytes

Concurrency Level:      1
Time taken for tests:   0.725 seconds
Complete requests:      1
Failed requests:        0
Total transferred:      4864 bytes
HTML transferred:       4577 bytes
Requests per second:    1.38 [#/sec] (mean)
Time per request:       724.850 [ms] (mean)
Time per request:       724.850 [ms] (mean, across all concurrent requests)
Transfer rate:          6.55 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:       29   29   0.0     29      29
Processing:   696  696   0.0    696     696
Waiting:      696  696   0.0    696     696
Total:        725  725   0.0    725     725