implement /api/v1/install (includes reconfig, e.g. cpu allocation ratio)

[snowch]

GET /api/v1/install/ HTTP/1.1
Host: 127.0.0.1:8080
Accept-Encoding: gzip, deflate
REMOTE_ADDR: 86.138.132.112
Accept: */*
User-Agent: python-requests/2.6.0 CPython/2.7.5 Linux/3.10.0-1127.13.1.el7.x86_64
Connection: keep-alive
X-BDS-SESSION: /api/v2/session/5a1cec10-f62e-44dc-9692-e3f52a2dcc7c
Authorization: /api/v2/session/5a1cec10-f62e-44dc-9692-e3f52a2dcc7c

HTTP/1.1 200 OK
Access-Control-Allow-Origin: *
Content-Length: 509
Content-Type: application/json
Date: Tue, 21 Jul 2020 14:11:29 GMT
Server: HPE Ezmeral Container Platform 5.1

{"install_state":"installed","original_controllerip":"10.1.0.210","config_data":[],"sysinfo":[],"bds_ha_enabled":"No","primary_ip":"10.1.0.210","primary_hostname":"ip-10-1-0-210.us-west-2.compute.internal","bds_global_version":"5.1","bds_global_buildnumber":"2055","bds_global_sku":"Enterprise-Docker","bds_global_isskudocker":"true","float_range":"172.18.0.0/16","intgateway_ip":"172.18.0.1","routable_network":false,"proxy_present":true,"tenant_network_isolation":true,"bdshared_storage_localfstype":"mapr"}

[snowch]

PUT /api/v1/install/?install_reconfig HTTP/1.1
Host: 127.0.0.1:8080
Content-Length: 27
Accept-Encoding: gzip, deflate
REMOTE_ADDR: 86.138.132.112
Accept: */*
User-Agent: python-requests/2.6.0 CPython/2.7.5 Linux/3.10.0-1127.18.2.el7.x86_64
Connection: keep-alive
X-BDS-SESSION: /api/v2/session/46acd825-491e-4e81-95ed-3190bb854a27
Authorization: /api/v2/session/46acd825-491e-4e81-95ed-3190bb854a27

{"cpu_allocation_ratio": 3}

HTTP/1.1 204 No Content
Access-Control-Allow-Origin: *
Content-Length: 0
Content-Type: text/plain
Date: Sun, 02 Aug 2020 09:43:56 GMT
Server: HPE Ezmeral Container Platform 5.1