Incorrect GoogLeNet forward pass and layer naming

[gangula-karthik]

The provided implementation of GoogLeNet contains several mistakes:

• Wrong usage of undefined layers like a4, b4, etc. instead of the defined im3, im4, etc.
• Incorrect data flow: output of im1 is not passed to im2; instead, the original input is reused.
• Typographical errors: using maxpool instead of max_pool, and avgerage_pool instead of average_pool.