Issue #340: Use AsciiDoc AST to create open v3 support (#381)

* Use Asciidoc AST to create OpenApi v3 support

* Add `Overview` information

* Add `Servers` information

* Fix document authors

* Fix document authors

* Add `Servers` information

* Add `Servers` information

* Add `Servers` information

* Add `Servers` information

* Add `Path Parameters` information

* Add `Path Parameters` information

* Add `Path Responses Links` information

* Add `Tags` information

* Add `Comonents.Schemas` information

* Add `Comonents.Parameters` information

* Add `External Docs` information

* Add `Components Responses` information

* Add `Components Headers` information

* Add `Components Links` information

* Delete unused test fixtures

* Change asciidoctorJ dependency to asciidoctorj-api, to remove the the need for JRuby

libraries.gradle

@@ -6,7 +6,7 @@ ext {
     dependencyOverrides = [:]
 }
 implLibraries = [
-        asciiDocJ  : "org.asciidoctor:asciidoctorj:2.1.0",
+        asciiDocJApi  : "org.asciidoctor:asciidoctorj-api:2.2.0",
         commonsBeanUtils   : "commons-beanutils:commons-beanutils:1.9.4",
         commonsCodec       : "commons-codec:commons-codec:1.13",
         commonsCollections4: "org.apache.commons:commons-collections4:4.4",
@@ -27,7 +27,7 @@ implLibraries = [
 ]
 
 testLibraries = [
-        asciiDocJ  : "org.asciidoctor:asciidoctorj:2.1.0",
+        asciiDocJ  : "org.asciidoctor:asciidoctorj:2.2.0",
         assertj    : "org.assertj:assertj-core:3.13.2",
         assertjDiff: "io.github.robwin:assertj-diff:0.1.1",
         junit      : "junit:junit:4.12",

swagger2markup-asciidoc/build.gradle

@@ -15,10 +15,11 @@ dependencies {
 //        resolutionStrategy.force dependencyOverrides.findBugs
 //        resolutionStrategy.force dependencyOverrides.jaksonCore
     }
-    implementation implLibraries.asciiDocJ
+    implementation implLibraries.asciiDocJApi
     implementation implLibraries.commonsText
     implementation implLibraries.slf4j
     testImplementation implLibraries.commonsIO
+    testImplementation testLibraries.asciiDocJ
     testImplementation testLibraries.junit
     testImplementation testLibraries.logback
 }