Move REST API test scripts into a common directory

Moved and renamed the starting and stopping scripts from the REST API
tests to a common directory. This way the MaxCtrl tests can use the same
scripts to start and stop MaxScale.

Also moved the test configuration file into the `test/` directory and
changed some of the default directory locations.

test/maxscale_test.cnf

@@ -0,0 +1,137 @@
+[maxscale]
+threads=4
+libdir=@CMAKE_INSTALL_PREFIX@/@MAXSCALE_LIBDIR@
+logdir=@CMAKE_INSTALL_PREFIX@/log/maxscale/
+datadir=@CMAKE_INSTALL_PREFIX@/lib/maxscale
+cachedir=@CMAKE_INSTALL_PREFIX@/cache/maxscale
+language=@CMAKE_INSTALL_PREFIX@/lib/maxscale/
+piddir=@CMAKE_INSTALL_PREFIX@/run/maxscale/
+admin_auth=false
+
+[MySQL Monitor]
+type=monitor
+module=mysqlmon
+servers=server1,server2,server3,server4
+user=maxuser
+passwd=maxpwd
+monitor_interval=10000
+
+[RW Split Router]
+type=service
+router=readwritesplit
+servers=server1,server2,server3,server4
+user=maxuser
+passwd=maxpwd
+max_slave_connections=100%
+
+[SchemaRouter Router]
+type=service
+router=schemarouter
+servers=server1,server2,server3,server4
+user=maxuser
+passwd=maxpwd
+auth_all_servers=1
+
+[RW Split Hint Router]
+type=service
+router=readwritesplit
+servers=server1,server2,server3,server4
+user=maxuser
+passwd=maxpwd
+max_slave_connections=100%
+filters=Hint
+
+[Read Connection Router]
+type=service
+router=readconnroute
+router_options=master
+servers=server1
+user=maxuser
+passwd=maxpwd
+
+[Hint]
+type=filter
+module=hintfilter
+
+[recurse3]
+type=filter
+module=tee
+service=RW Split Router
+
+[recurse2]
+type=filter
+module=tee
+service=Read Connection Router
+
+[recurse1]
+type=filter
+module=tee
+service=RW Split Hint Router
+
+[Debug Interface]
+type=service
+router=debugcli
+
+[CLI]
+type=service
+router=cli
+
+[Read Connection Listener]
+type=listener
+service=Read Connection Router
+protocol=MySQLClient
+port=4008
+
+[RW Split Listener]
+type=listener
+service=RW Split Router
+protocol=MySQLClient
+port=4006
+
+[SchemaRouter Listener]
+type=listener
+service=SchemaRouter Router
+protocol=MySQLClient
+port=4010
+
+[RW Split Hint Listener]
+type=listener
+service=RW Split Hint Router
+protocol=MySQLClient
+port=4009
+
+[Debug Listener]
+type=listener
+service=Debug Interface
+protocol=telnetd
+port=4442
+
+[CLI Listener]
+type=listener
+service=CLI
+protocol=maxscaled
+socket=default
+
+[server1]
+type=server
+address=127.0.0.1
+port=3000
+protocol=MySQLBackend
+
+[server2]
+type=server
+address=127.0.0.1
+port=3001
+protocol=MySQLBackend
+
+[server3]
+type=server
+address=127.0.0.1
+port=3002
+protocol=MySQLBackend
+
+[server4]
+type=server
+address=127.0.0.1
+port=3003
+protocol=MySQLBackend