Define abstract HTTP client tests

[pavolloffay]

Define abstract HTTP client test class that will be used to test HTTP client instrumentations. As a starting point we could use okhttp tests

javaagent/instrumentation/okhttp/okhttp-3.0/src/test/java/io/opentelemetry/instrumentation/hypertrace/okhttp/v3_0/OkHttpTracingInterceptorTest.java

Line 38 in 6395bc9

public class OkHttpTracingInterceptorTest extends AbstractInstrumenterTest {

• test JSON capture
• test plain text capture
• test x-www-form-urlencoded capture
• test headers capture

[pavolloffay]

Missing tests:

• apache async client
• micronaut @shashank11p could you please paste here link to the issue in micronaut?

[shashank11p]

Micronaut client issue for version 1.0.0 micronaut-projects/micronaut-core#4886