Exit the application when a panic occurs

[chamil321]

Purpose

$subject and fixes ballerina-platform/ballerina-library#2714

Examples

import ballerina/http;

service / on new http:Listener(9090) {
    resource function 'default [string... ptt](http:Request req) {
        panic error http:ListenerError("This fails");
    }
}

Client :

curl -v http://localhost:9090/ptt
*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 9090 (#0)
> GET /ptt HTTP/1.1
> Host: localhost:9090
> User-Agent: curl/7.64.1
> Accept: */*
> 
< HTTP/1.1 500 Internal Server Error
< content-type: text/plain
< content-length: 10
< server: ballerina
< date: Wed, 31 Aug 2022 10:26:23 +0530
< 
* Connection #0 to host localhost left intact
This fails* Closing connection 0

Server output :

error: This fails
        at chamil.foo.0.$anonType$_0:$default$**(main.bal:47)

Checklist

• Linked to an issue
• Updated the changelog
• [ ] Added tests - Cant have tests as the JVM exits
• Updated the spec

[codecov]

Codecov Report

Merging #1203 (7346641) into master (e25ef97) will increase coverage by 0.04%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##             master    #1203      +/-   ##
============================================
+ Coverage     81.17%   81.22%   +0.04%     
  Complexity       71       71              
============================================
  Files           360      360              
  Lines         19382    19377       -5     
  Branches       4358     4359       +1     
============================================
+ Hits          15734    15739       +5     
+ Misses         2828     2819       -9     
+ Partials        820      819       -1     

Impacted Files	Coverage Δ
ballerina/http_errors.bal	50.00% <ø> (ø)
...va/io/ballerina/stdlib/http/api/HttpConstants.java	100.00% <ø> (ø)
...rina/stdlib/http/api/HttpCallableUnitCallback.java	82.17% <33.33%> (-2.36%)	⬇️
ballerina/auth_desugar.bal	91.72% <100.00%> (ø)
...va/io/ballerina/stdlib/http/api/HttpErrorType.java	100.00% <100.00%> (ø)
.../http/api/HttpResponseInterceptorUnitCallback.java	89.74% <100.00%> (+0.08%)	⬆️
...ractimpl/sender/states/http2/RequestCompleted.java	68.00% <0.00%> (-12.00%)	⬇️
...mpl/sender/states/http2/WaitingFor100Continue.java	59.64% <0.00%> (-8.78%)	⬇️
...ctimpl/sender/states/http2/EntityBodyReceived.java	35.71% <0.00%> (-3.58%)	⬇️
...ontractimpl/listener/http2/Http2SourceHandler.java	88.88% <0.00%> (-2.78%)	⬇️
... and 10 more

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