Gatling generator2 issue #6927 (#6934)

* Initial commit, Generates everything necessary to run a performnace test against a swagger api.  Just have to fill out the CSV feeder files with your data.

* adding samples and gatling-petstore.sh file

* Extending the AbstractScalaCodeGen

* Checking in the CodegenConfig file as it is needed to generate

* removing escaped reserved words

* Changed model to be able to make all variables utilize an underscore while json fields are still just the variable name

* Changing underscore to var as interpolation can not start with a _ in scala

* Fixing path params

* allow you to pass in a system property to define which config to use as a workload profile, use rate and instance multipliers to scale up and down your test, added ramp down after the test is completed, added global assertions.

* Addressing PR feedback

* missed semi-colon

* Bringing everything up to date with the renames that were suggested

samples/client/petstore-security-test/java/okhttp-gson/src/main/gen/io/swagger/client/BuildConfig.java

@@ -0,0 +1,8 @@
+/*___Generated_by_IDEA___*/
+
+package io.swagger.client;
+
+/* This stub is only used by the IDE. It is NOT the BuildConfig class actually packed into the APK */
+public final class BuildConfig {
+  public final static boolean DEBUG = Boolean.parseBoolean(null);
+}

samples/client/petstore-security-test/java/okhttp-gson/src/main/gen/io/swagger/client/Manifest.java

@@ -0,0 +1,7 @@
+/*___Generated_by_IDEA___*/
+
+package io.swagger.client;
+
+/* This stub is only used by the IDE. It is NOT the Manifest class actually packed into the APK */
+public final class Manifest {
+}

samples/client/petstore-security-test/java/okhttp-gson/src/main/gen/io/swagger/client/R.java

@@ -0,0 +1,7 @@
+/*___Generated_by_IDEA___*/
+
+package io.swagger.client;
+
+/* This stub is only used by the IDE. It is NOT the R class actually packed into the APK */
+public final class R {
+}