easier to build - set the username and pw in the build

so in my humanmine.properties for example, I have this:

```
db.common-tgt-items.datasource.serverName=localhost
db.common-tgt-items.datasource.databaseName=items-humanmine
db.common-tgt-items.datasource.user=ank
db.common-tgt-items.datasource.password=ank
```

I have to update the username and password to be `postgres `

Instead we could have the script delete any lines that start with:

```
# delete these lines from humanmine.properties
db.common-tgt-items.datasource.user
db.common-tgt-items.datasource.password
```

And replace with these lines
```
# add these lines to humanmine.properties
db.common-tgt-items.datasource.user=postgres
db.common-tgt-items.datasource.password=postgres
```

Same for tomcat.

Just less steps for the user, and less bugs!