Bump beta version, remove ampersand from javadocs

Author: cnorburn

build.gradle

@@ -14,7 +14,7 @@ apply plugin: 'java'
 
 group = 'network.casper'
 // Version number update for release
-version='2.7.0-BETA.1'
+version='2.7.0-BETA.2'
 sourceCompatibility = 1.8
 targetCompatibility = 1.8
 

src/main/java/com/casper/sdk/model/entity/contract/Package.java

@@ -17,7 +17,7 @@
 @NoArgsConstructor
 public class Package {
 
-    /** All versions (enabled & disabled) */
+    /** All versions (enabled and disabled) */
     @JsonProperty("versions")
     private List<Versions> versions;