Fix flake8 violations

[davide-ceretti]

./meteora/requestor.py:58:34: E901 SyntaxError: invalid syntax
./meteora/server.py:35:1: W293 blank line contains whitespace
./meteora/server.py:38:1: F401 'time' imported but unused
./meteora/server.py:42:1: W293 blank line contains whitespace
./meteora/server.py:44:1: W293 blank line contains whitespace
./meteora/server.py:48:1: E302 expected 2 blank lines, found 1
./meteora/server.py:51:1: W293 blank line contains whitespace
./meteora/server.py:56:1: W293 blank line contains whitespace
./meteora/server.py:59:1: W293 blank line contains whitespace
./meteora/server.py:60:1: E302 expected 2 blank lines, found 1
./meteora/server.py:67:1: E302 expected 2 blank lines, found 1
./meteora/server.py:73:29: E128 continuation line under-indented for visual indent
./meteora/server.py:74:29: E128 continuation line under-indented for visual indent
./meteora/server.py:74:80: E501 line too long (80 > 79 characters)
./meteora/server.py:75:29: E128 continuation line under-indented for visual indent
./meteora/server.py:76:29: E128 continuation line under-indented for visual indent
./meteora/server.py:77:29: E128 continuation line under-indented for visual indent
./meteora/server.py:78:29: E128 continuation line under-indented for visual indent
./meteora/server.py:79:29: E128 continuation line under-indented for visual indent
./meteora/server.py:80:29: E128 continuation line under-indented for visual indent
./meteora/server.py:81:29: E128 continuation line under-indented for visual indent
./meteora/server.py:81:80: E501 line too long (81 > 79 characters)
./meteora/server.py:82:55: E231 missing whitespace after ','
./meteora/server.py:83:28: E231 missing whitespace after ','
./meteora/server.py:90:1: W293 blank line contains whitespace
./meteora/server.py:91:1: E302 expected 2 blank lines, found 1
./meteora/server.py:96:1: W293 blank line contains whitespace
./meteora/server.py:105:1: W293 blank line contains whitespace
./meteora/server.py:108:11: W292 no newline at end of file
./meteora/utils.py:7:1: W391 blank line at end of file