Combine #if/#endif directives into #if/#else/#endif in CFE_TIME_Tone1HzISR

[skliper]

Is your feature request related to a problem? Please describe.
Mutually exclusive logic:

cFE/modules/time/fsw/src/cfe_time_tone.c

Lines 1051 to 1064 in 84ba9a9

	/*
	** Maintain virtual MET as count of valid tone signal interrupts...
	** (not set to zero by reset command)
	*/
	#if (CFE_PLATFORM_TIME_CFG_VIRTUAL == true)
	CFE_TIME_Global.VirtualMET++;
	#endif
	/*
	** Maintain virtual MET as count read from h/w MET register...
	*/
	#if (CFE_PLATFORM_TIME_CFG_VIRTUAL != true)
	OS_GetLocalMET(&CFE_TIME_Global.VirtualMET);
	#endif

Describe the solution you'd like
Use #if/#else/#endif

Describe alternatives you've considered
#302 would likely make this obsolete

Additional context
Code review

Requester Info
Jacob Hageman - NASA/GSFC