Pass `yes` to installmgr --init

Othewise tests hang on this

```
[root@ip-172-31-26-137 str]# ./installmgr.sh
+ OPTS=--allow-internet-access-and-risk-tracing-and-jail-or-martyrdom
+ installmgr --allow-internet-access-and-risk-tracing-and-jail-or-martyrdom -init

While connecting to an encrypted install source, SWORD can allow
unverified peers, e.g., self-signed certificates. While this is
generally considered safe because SWORD only retrieves Bible content
and does not send any data to the server, it could still possibly
allow a malicious actor to sit between you and the server, as with
unencrypted sources.  Type no to turn this off.

Would you like to allow unverified peers? [yes] ^C
```

Signed-off-by: Miroslav Vadkerti <mvadkert@redhat.com>

tests/installmgr.sh

@@ -2,6 +2,6 @@
 set -ex
 
 OPTS="--allow-internet-access-and-risk-tracing-and-jail-or-martyrdom"
-installmgr $OPTS -init
+yes | installmgr $OPTS -init
 installmgr $OPTS -sc
 installmgr $OPTS -r CrossWire