message: Update version for Core release
diff: #define AZURE_CORE_VERSION_MAJOR 1
  #define AZURE_CORE_VERSION_MINOR 7
  #define AZURE_CORE_VERSION_PATCH 0
  -#define AZURE_CORE_VERSION_PRERELEASE "beta.2"
  +#define AZURE_CORE_VERSION_PRERELEASE ""
  #define AZURE_CORE_VERSION_ITOA_HELPER(i) #i
  #define AZURE_CORE_VERSION_ITOA(i) AZURE_CORE_VERSION_ITOA_HELPER(i)
  