Change Agent versioning schema

# Why is this change needed?
Build version should be included in major version number since it is impossible to have predicted version number for release. Redo Agent versioning in [standard ruby convention](https://guides.rubygems.org/patterns/)

# How does it address the issue?
Set version number as 1.1.0 according to ruby doc. We will retrieve information about version from `gemspec` file, so remove version from `gemspec` file name

# How was this tested ?
bb version

https://rally1.rallydev.com/#/377133917144d/detail/userstory/390428686488

cr https://code.amazon.com/reviews/CR-26030025

# Conflicts:
#	Config

Author: Alena Kastsiukavets

codedeploy_agent-1.1.0.gemspec codedeploy_agent.gemspeccodedeploy_agent-1.1.0.gemspec renamed to codedeploy_agent.gemspec

@@ -1,13 +1,15 @@
 Gem::Specification.new do |spec|
   spec.name          = 'aws_codedeploy_agent'
-  spec.version       = 0.1
+  spec.version       = '1.1.0'
   spec.summary       = 'Packages AWS CodeDeploy agent libraries'
   spec.description   = 'AWS CodeDeploy agent is responsible for doing the actual work of deploying software on an individual EC2 instance'
   spec.author        = 'Amazon Web Services'
   spec.files         = Dir['{lib,bin,conf,vendor}/**/*']
   spec.homepage      = "https://github.com/aws/aws-codedeploy-agent"
   spec.bindir        = ['bin']
   spec.require_paths = ['lib']
+  spec.license        = 'Apache-2.0'
+  spec.required_ruby_version = '~> 2.0'
 
   spec.add_dependency('gli', '~> 2.5')
   spec.add_dependency('json_pure', '~> 1.6')