Ignoring multiple spaces or tabs, while checking for sysctl changes.

For states.sysctl() , test=True seems to always show a pending  (at least on CentOS platform). The original code under states.sysctl.present() checks for exact string match between sysctl parameters value coming from a state file and sysctl value read via sysctl -a (used by modules.sysctl.show() call, that always contains tab separated values).

This fix will ignore multiple spaces or tabs while comparing (by normalizing with single space)

e.g: mystate.sls
<pre>
net.ipv4.tcp_rmem:
  sysctl:
    - present
    - value: 4096 87380 16777216
</pre>

value: contains single space separated numerals, however after applying above state successfully, sysctl -a shows tab separated values (kernel presents it that way)  and subsequent  salt '*' state.sls mystate test=True always shows a pending update.