server_tool_id_seq not incrementing when we insert a tool manually

[JasperWallace]

When we import the tools from the old acserver we insert the tool data into server_tool, including the id column, which we need to preserve.

As a result server_tool_id_seq does not get incremented (it starts at 1) and when trying to add a tool django dies with:

IntegrityError: duplicate key value violates unique constraint "server_tool_pkey"
DETAIL: Key (id)=(3) already exists.

in the logs.

I've manualy run:

select nextval('server_tool_id_seq'::regclass);

in postgres until server_tool_id_seq is outside the range of existing acnode id's so this issue is worked around for now, but we might encounter similar problems at some point.

[JasperWallace]

see:

https://github.com/django/django/blob/master/django/core/management/commands/loaddata.py#L115

for how django does it.
We should remove the test tool with id 999 otherwise all subsequent tools will be > 999 which will look a bit wierd.