TT#39642 Disable title checking for panel subscriber login

Recently subscriber self-care has been switched to new CSC by
default and the content is generated now by js framework.
https://gerrit.mgm.sipwise.com/#/c/22031/
Testing title (html title is empty now) with simple curl
doesn't work anymore. So fixing here title check to allow
goss check pass successfully.

Change-Id: I7e1c4de6d3a4027c1757590085ad76adc87251b9

templates/900_service-ngcp-api.yaml.tt2

@@ -49,14 +49,14 @@ command:
   "curl --insecure -L http://[% web_ext_ips.0 -%]/":
     exit-status: 0
     stdout:
-      - "/Subscriber Sign In/"
+      - <title></title>
     stderr: []
     timeout: 30000
 
   "curl --insecure -L https://[% web_ext_ips.0 -%]/":
     exit-status: 0
     stdout:
-      - "/Subscriber Sign In/"
+      - <title></title>
     stderr: []
     timeout: 30000
 
@@ -94,14 +94,14 @@ command:
   "curl --insecure -L http://[% web_ext_ips.0 -%]:1443/login/subscriber":
     exit-status: 0
     stdout:
-      - "/Subscriber Sign In/"
+      - <title></title>
     stderr: []
     timeout: 30000
 
   "curl --insecure -L https://[% web_ext_ips.0 -%]:1443/login/subscriber":
     exit-status: 0
     stdout:
-      - "/Subscriber Sign In/"
+      - <title></title>
     stderr: []
     timeout: 30000